Ronald M. Goldberg v. Commissioner , 2020 T.C. Memo. 38 ( 2020 )


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  •                                           T.C. Memo. 2020-38
    UNITED STATES TAX COURT
    RONALD M. GOLDBERG, Petitioner v.
    COMMISSIONER OF INTERNAL REVENUE, Respondent
    Docket No. 14294-13L.                                           Filed April 2, 2020.
    Ronald M. Goldberg, for himself.
    Michael T. Shelton, for respondent.
    CONTENTS
    MEMORANDUM FINDINGS OF FACT AND OPINION . . . . . . . . . . . . . . . . . . 8
    I.     Issues for decision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
    II.    The Form-4549-as-a-contract argument . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
    III.   Interest abatement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
    -2-
    [*2] A.   The Goldbergs’ 2004 income-tax return and the early stages of the
    examination of their 2004 income-tax return . . . . . . . . . . . . . . . . . . 55
    B.   Period 1: September 12-20, 2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
    1.     Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
    2.     Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
    3.     Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
    C.   Period 2: September 20-27, 2007 . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
    1.     Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
    2.     Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
    3.     Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
    D.   Intermediary period: September 28 through November 30, 2007 . . 67
    E.   Period 3: December 1, 2007, through January 31, 2008 . . . . . . . . . 68
    1.     Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
    2.     Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
    3.     Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
    F.   Period 4: January 31 through March 11, 2008 . . . . . . . . . . . . . . . . . 71
    1.     Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
    2.     Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
    -3-
    [*3]        3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
    G.   Period 5: March 11 through April 28, 2008 . . . . . . . . . . . . . . . . . . . 74
    1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
    2.      Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
    3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
    H.   Intermediary period: April 29 through July 17, 2008 . . . . . . . . . . . 78
    I.   Period 6: July 18-30, 2008 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
    1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
    2.      Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
    3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
    J.   Intermediary period: July 31 through August 7, 2008 . . . . . . . . . . . 83
    K.   Period 7: August 8-16, 2008. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
    1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
    2.      Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
    3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
    L.   Intermediary period: August 17-26, 2008 . . . . . . . . . . . . . . . . . . . . 88
    M.   Period 8: August 27 through September 4, 2008 . . . . . . . . . . . . . . . 88
    1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
    -4-
    [*4]        2.       Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
    3.       Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
    N.   Period 9: September 4-22, 2008 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
    1.       Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
    2.       Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
    3.       Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
    O.   Period 10: September 23-25, 2008 . . . . . . . . . . . . . . . . . . . . . . . . . . 96
    1.       Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
    2.       Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
    3.       Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
    P.   Intermediary period: September 26-28, 2008. . . . . . . . . . . . . . . . . . 99
    Q.   Period 11: September 29 through November 13, 2008 . . . . . . . . . 100
    1.       Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
    2.       Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
    3.       Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
    R.   Intermediary period: November 14, 2008, through
    May 28, 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
    S.   Period 12: May 29 through June 8, 2009 . . . . . . . . . . . . . . . . . . . . 107
    -5-
    [*5]        1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
    2.      Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
    3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
    T.   Intermediary day: June 9, 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
    U.   Period 13: June 10-15, 2009 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
    1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
    2.      Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
    3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
    V.   Intermediary period: June 16-19, 2009 . . . . . . . . . . . . . . . . . . . . . 115
    W.   Period 14: June 20 through July 27, 2009 . . . . . . . . . . . . . . . . . . . 116
    1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
    2.      Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
    3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
    X.   Period 15: July 27, 2009, through August 9, 2010. . . . . . . . . . . . . 119
    1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
    2.      Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
    3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
    Y.   Intermediary period: August 10 through November 14, 2010. . . . 122
    -6-
    [*6] Z.     Period 16: November 15 through December 8, 2010. . . . . . . . . . . 122
    1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
    2.      Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
    3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
    AA. Period 17: December 8, 2010, through January 3, 2011 . . . . . . . . 125
    1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
    2.      Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
    3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
    BB. Intermediary period: January 4-6, 2011 . . . . . . . . . . . . . . . . . . . . . 133
    CC. Period 18: January 7-10, 2011 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
    1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
    2.      Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
    3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
    DD. Intermediary period: January 11-12, 2011 . . . . . . . . . . . . . . . . . . . 137
    EE.    Period 19: January 13 through February 15, 2011 . . . . . . . . . . . . . 137
    1.      Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
    2.      Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
    3.      Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
    -7-
    [*7] FF.    Intermediary period: February 16 through March 28, 2011 . . . . . 140
    GG. Period 20: March 29 through April 15, 2011 . . . . . . . . . . . . . . . . . 141
    1.     Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
    2.     Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
    3.     Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
    HH. Intermediary period: April 16-28, 2011 . . . . . . . . . . . . . . . . . . . . . 144
    II.    Period 21: April 29 through August 23, 2011 . . . . . . . . . . . . . . . . 145
    JJ.    Period 22: August 24, 2011, through June 26, 2013 . . . . . . . . . . . 147
    1.     Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
    2.     Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
    a.       Final notice of intent to levy and Goldberg’s claim
    for interest abatement . . . . . . . . . . . . . . . . . . . . . . . . . 148
    b.       Contact with Taxpayer Advocate Service . . . . . . . . . 149
    c.       IRS files notice of lien . . . . . . . . . . . . . . . . . . . . . . . . 150
    d.       Collection-due-process proceedings. . . . . . . . . . . . . . 151
    e.       Notice of determination . . . . . . . . . . . . . . . . . . . . . . . 153
    3.     Analysis and holding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
    a.       Whether remand is appropriate . . . . . . . . . . . . . . . . . . 156
    -8-
    [*8]                     b.        Whether Goldberg is entitled to interest abatement . . 158
    IV.    Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
    MEMORANDUM FINDINGS OF FACT AND OPINION
    MORRISON, Judge: On November 1, 2012, the respondent (referred to
    here as the IRS) issued to the petitioner, Mr. Ronald M. Goldberg, a notice that it
    had filed a notice of lien on his property to help collect his 2004 income-tax
    liabilities. Goldberg timely requested a collection-due-process hearing, also
    known as a CDP hearing. The IRS Office of Appeals held the hearing and issued
    a determination sustaining the lien-notice filing. Goldberg filed a timely petition
    with this Court. When he filed his petition, Goldberg was a resident of Illinois.
    The Court remanded the case to the Office of Appeals for it to consider
    Goldberg’s claims for interest abatement. After a supplemental hearing, the Office
    of Appeals issued a supplemental determination rejecting Goldberg’s claims for
    interest abatement. The Court then held a trial. Our jurisdiction over this case is
    established by section 6330(d)(1).1
    1
    Unless otherwise indicated, all references to sections are to the Internal
    Revenue Code of 1986, as amended and in effect at the relevant times. All
    (continued...)
    -9-
    [*9] Our opinion addresses Goldberg’s arguments that the Office of Appeals
    made various errors in its determination and supplemental determination. The IRS
    conceded on post-trial brief that Goldberg is entitled to interest abatement for the
    period from April 29 through August 23, 2011 (Period 21). Because of this
    concession, we hold that Goldberg is entitled to interest abatement for that period.
    Other than that, we sustain the Office of Appeals’ determination, as supplemented.
    This opinion is divided into four parts. In part I, we determine what issues
    to resolve in this case. We conclude that we will resolve only two issues: (1)
    whether the Form 4549, “Income Tax Examination Changes”, prepared by the IRS
    in April 2011 and signed by Goldberg and his wife in May 2011 (which we refer
    to as the May 2011 Form 4549) was a binding contract between the IRS and the
    Goldbergs under which the Goldbergs owed no interest for the 2004 tax year and
    (2) whether Goldberg is entitled to abatement of interest under section 6404(e)(1).
    We resolve the first issue in part II, holding that the May 2011 Form 4549 is not a
    binding contract under which the Goldbergs owed no interest for 2004, and the
    second issue in part III, holding that Goldberg is not entitled to abatement of
    interest except for the period stated above. In part IV, we conclude the opinion by
    1
    (...continued)
    references to Rules are to the Tax Court Rules of Practice and Procedure.
    - 10 -
    [*10] summarizing our holding that the notice of determination is sustained, as
    supplemented, with the exception of the conceded period (Period 21).
    I.    Issues for decision
    In this part we determine what issues are to be resolved by the Court. For
    an initial cut of what issues are to be resolved, we consult Goldberg’s briefs. That
    is because, as a general rule, a party must raise an issue on brief for the issue to be
    properly raised for the Court’s consideration. Rule 151(e)(4) and (5). Goldberg
    makes the following six arguments:
    First, Goldberg argues that his income-tax liability for 2004 must be
    determined by a stipulation of settled issues in Captain Douglas J. Brown, Inc. v.
    Commissioner, T.C. Dkt. No. 30453-08 (Apr. 29, 2011). As we explain below,
    though, we have already considered and rejected his argument in a prior order.
    See infra pt. I, pp. 37-38.
    Second, Goldberg argues that the May 2011 Form 4549 is a binding
    contract under which the Goldbergs owe no interest for the 2004 tax year. We
    consider this argument to be properly before the Court. See infra pt. I, pp. 38-39.
    Third, Goldberg argues that the May 2011 Form 4549 entitles him to relief
    under a theory of promissory estoppel. As we explain below, though, this issue is
    not properly before the Court. See infra pt. I, pp. 39-40.
    - 11 -
    [*11] Fourth, Goldberg argues that the May 2011 Form 4549 equitably estopped
    the IRS from assessing interest on his 2004 income-tax liability. As we explain
    below, though, this issue is not properly before the Court. See infra pt. I,
    pp. 39-40.
    Fifth, Goldberg argues that the May 2011 Form 4549 should be voided
    because he and his wife were induced to sign it through fraud or
    misrepresentation. As we explain below, though, this issue is not properly before
    the Court. See infra pt. I, pp. 39-40.
    Sixth, Goldberg argues that he is entitled to abatement of interest under
    section 6404(e)(1). As we explain below, this issue is properly before the Court.
    See infra pt. I, p. 39.
    Goldberg’s arguments involve various legal principles. Over the next few
    pages we discuss these legal principles generally. See infra pt. I, pp. 11-19. A
    good starting point is the principle that the IRS cannot collect a tax until it has
    made an assessment of the tax. See sec. 6502(a) (assessment is precondition for
    imposing levy); sec. 6322 (assessment results in lien); Jordan v. Commissioner,
    
    134 T.C. 1
    , 12 (2010), supplemented by T.C. Memo. 2011-243; 1 Gerald A.
    Kafka, Rita A. Cavanagh & Sean M. Akins, Litigation of Federal Civil Tax
    Controversies, para. 3.01, at 3-2 (2d ed. 2016) (“No tax may be collected by the
    - 12 -
    [*12] Service until after it has been assessed.”); 1 Laurence F. Casey, Federal Tax
    Practice, sec. 2.01, at 2-3 to 2-4 (Supp. 2019). The authority of the IRS to assess
    is subject to statutory restrictions designed to protect taxpayers. Under section
    6501(a), the IRS cannot assess tax more than three years after the return was filed.2
    Under section 6213(a), the IRS cannot assess a deficiency--generally the amount
    of unreported tax--unless the IRS first mails the taxpayer a notice of deficiency.
    See sec. 6211(a) (defining “deficiency” as the correct tax, minus the tax reported,
    with certain exceptions not relevant here). The notice of deficiency gives the
    taxpayer the right to file a Tax Court petition to redetermine the amount of the
    deficiency. Secs. 6213(a), 6214(a).
    At the close of an IRS examination, the revenue agent commonly prepares a
    report of the examination’s findings. A Form 4549 is sometimes used for this
    report (or for a portion of the report). The Form 4549 has spaces for the revenue
    agent to enter the taxes, penalties, and interest determined as a result of the IRS
    examination. The form is worded such that if the taxpayer signs the form, the
    taxpayer agrees to the immediate assessment and collection of any increase to
    taxes and penalties therein, plus the interest statutorily imposed on them. Thus, a
    2
    But if the return was filed early, the three-year period starts with the due
    date of the return. Sec. 6501(b)(1).
    - 13 -
    [*13] taxpayer signing the Form 4549 waives the section 6213(a) prohibition on
    the IRS’s assessing a tax deficiency without the mailing of a notice of deficiency.
    See sec. 6213(d) (stating that taxpayers may waive restrictions on assessment
    provided in sec. 6213(a)). A taxpayer signing the Form 4549 also waives “appeal
    rights with the Internal Revenue Service” and the right “to contest in the United
    States Tax Court the findings in this report.” See Aguirre v. Commissioner, 
    117 T.C. 324
    , 327 (2001).
    Assessment of tax by the IRS automatically creates a lien on the taxpayer’s
    property in favor of the United States. Sec. 6322. To establish the priority of the
    tax lien against certain other types of creditors, the IRS may file a notice of lien.
    Sec. 6323(a), (f). After filing a notice of lien, the IRS is required to give notice to
    the taxpayer giving the taxpayer the right to a CDP hearing with the Office of
    Appeals. Sec. 6320(a)(1), (3). Both the lien and the notice of lien assist the IRS
    in collecting the tax.
    The IRS can collect an assessed tax by levy. Secs. 6502(a), 6331(a). Before
    it makes the levy, the IRS must give the taxpayer notice of the proposed levy. Sec.
    6330(a)(1), (b)(1). This notice gives the taxpayer the right to request a CDP
    hearing.
    Id. A CDP
    hearing, whether held in conjunction with a levy or the filing
    of a notice of lien, is governed by section 6330(c). See sec. 6320(c). Section
    - 14 -
    [*14] 6330(c) sets forth the matters to be considered at the CDP hearing. Sec.
    6320(c). Section 6330(c)(2)(B) provides that the taxpayer may raise at the hearing
    challenges to the existence or amount of the underlying tax liability the IRS is
    seeking to collect if the taxpayer did not receive a notice of deficiency or did not
    otherwise have an opportunity to dispute such tax liability. Sec. 6320(c).
    After a CDP hearing, the Office of Appeals makes a determination. See sec.
    6330(c)(3). Section 6330(d)(1) provides that the person may file a Tax Court
    petition within 30 days of the notice of determination. The Tax Court then has
    jurisdiction to review the determination.
    Id. In appropriate
    circumstances, the Tax Court may remand a CDP case to the
    Office of Appeals for it to make a supplemental determination. The Tax Court has
    jurisdiction to review the determination as supplemented. See LG Kendrick, LLC
    v. Commissioner, 
    146 T.C. 17
    , 36 (2016), aff’d, 684 F. App’x 744 (10th Cir.
    2017); Kelby v. Commissioner, 
    130 T.C. 79
    , 87-88 (2008).
    Section 6601(a) provides that interest accrues on any underpayment of tax.
    Interest begins to accrue on the date that payment was due. Section 6601(g)
    provides that interest “may be assessed and collected at any time during the period
    within which the tax to which such interest relates may be collected.” Under
    section 6502(a)(1), the period of limitations on the collection of tax begins on the
    - 15 -
    [*15] date the IRS assesses the tax. Section 6502(a)(1) and section 6601(g) in
    combination form the following rule: the assessment of interest may occur only
    after the assessment of “the tax to which such interest relates”. See also Field v.
    United States, 
    381 F.3d 109
    , 113 (2d Cir. 2004) (“Since the IRS’s assessment of
    interest against * * * [the taxpayer-plaintiff] coincided with the commencement of
    the collection period, the assessment [of the interest] was no doubt timely.”); Priv.
    Ltr. Rul. 201319017 (May 10, 2013) (“[T]he Service cannot assess additional
    interest on * * * [a] tax liability that was never actually assessed.”). By executing
    a Form 4549, a taxpayer consents to the immediate assessment and collection of
    the tax and the interest to which the tax relates. Aguirre v. Commissioner, 
    117 T.C. 327
    .
    Section 6404(e)(1) provides that the IRS may abate assessed interest under
    certain conditions that we discuss infra part III. Section 6404(e)(2) provides that
    the IRS may abate interest under other conditions not relevant to this case.
    Section 6404(h)(1) provides that the Tax Court has jurisdiction over any action
    brought by a taxpayer to determine whether the IRS’s failure to abate interest
    under section 6404(e), including section 6404(e)(1), was an abuse of discretion.
    Two prerequisites for jurisdiction under section 6404(h)(1) are (1) the taxpayer’s
    net worth must not exceed the relevant ceiling, and (2) the action must be brought
    - 16 -
    [*16] within 180 days after the date of the mailing of the IRS’s final determination
    not to abate interest.
    As we observed above, in a CDP hearing a taxpayer is permitted to bring a
    challenge to the existence and amount of the underlying tax liability the IRS is
    seeking to collect through the levy (or the lien-notice filing) that triggered the
    CDP hearing. See sec. 6330(c)(2)(B). If the IRS is seeking to collect interest,
    then the taxpayer in a CDP hearing can challenge the liability for interest. Urbano
    v. Commissioner, 
    122 T.C. 384
    , 390 (2004); Montgomery v. Commissioner, 
    122 T.C. 1
    , 8 (2004). A challenge to liability for interest can be premised on the
    interest-abatement provisions of section 6404(e)(1). See Urbano v.
    Commissioner, 
    122 T.C. 390
    ; Katz v. Commissioner, 
    115 T.C. 329
    , 339 (2000).
    The regulations interpreting section 6330 provide that a “taxpayer can only
    ask the court to consider an issue, including a challenge to the underlying tax
    liability, that was properly raised in the taxpayer’s CDP hearing.” Sec.
    301.6330-1(f)(2), Q&A-F3, Proced. & Admin. Regs. An issue is properly raised if
    the taxpayer requests consideration of the issue by the Office of Appeals and
    presents evidence with respect to that issue after being given a reasonable
    opportunity to present such evidence. Id.; see also Giamelli v. Commissioner, 
    129 T.C. 107
    , 114-115 (2007).
    - 17 -
    [*17] In evaluating a determination by the Office of Appeals after a CDP hearing,
    the Court’s general standard of review for evaluating challenges to the underlying
    tax liability is de novo. Goza v. Commissioner, 
    114 T.C. 176
    , 181-182 (2000); see
    also Perkins v. Commissioner, 
    129 T.C. 58
    (2007); Downing v. Commissioner,
    
    118 T.C. 22
    , 29 (2002). The underlying tax liability is the liability the IRS is
    seeking to collect through the collection action that triggered the taxpayer’s right
    to request a CDP hearing. Klein v. Commissioner, 
    149 T.C. 341
    , 348-349 (2017).
    Thus, if the IRS is seeking to collect interest, then interest is the underlying
    liability. A taxpayer’s challenge to its underlying tax liability is generally
    reviewed de novo. Urbano v. Commissioner, 
    122 T.C. 393
    . This rule admits of
    an exception when the taxpayer’s challenge to interest liability is premised on the
    interest-abatement provisions of section 6404(e)(1). In such an instance, we have
    reviewed the determination of the Office of Appeals for abuse of discretion. See
    Downing v. Commissioner, 
    118 T.C. 30
    ; Krehnbrink v. Commissioner, T.C.
    Memo. 2019-56, at *17, appeal filed (6th Cir. Aug. 26, 2019); Estate of La Sala v.
    Commissioner, T.C. Memo. 2016-42, at *16-*17. Reviewing for abuse of
    discretion in that instance appropriately reflects the wording of section 6404(e)(1),
    which provides that the Secretary of the Treasury “may” abate an assessment of
    interest if the conditions named in section 6404(e)(1) are met. The word “may”
    - 18 -
    [*18] signifies that Congress has conferred discretion on the Secretary of the
    Treasury. Cf. Porter v. Commissioner, 
    132 T.C. 203
    , 206-208 (2009), abrogating
    Butler v. Commissioner, 
    114 T.C. 276
    (2000); see also
    id. at 237-238
    (Gustafson,
    J., dissenting).
    In CDP cases with the exception of those cases appealable to the Court of
    Appeals for the First, Eighth, or Ninth Circuit, the Tax Court employs a de novo
    scope of review. Robinette v. Commissioner, 
    123 T.C. 85
    , 101 (2004), rev’d, 
    439 F.3d 455
    (8th Cir. 2006); Golsen v. Commissioner, 
    54 T.C. 742
    , 757 (1970)
    (holding Tax Court follows precedent of circuit to which case would be appealable
    to extent precedent is “squarely in point”), aff’d, 
    445 F.2d 985
    (10th Cir. 1971);
    Murphy v. Commissioner, 
    469 F.3d 27
    , 31 (1st Cir. 2006), aff’g 
    125 T.C. 301
    (2005); Robinette v. Commissioner, 
    439 F.3d 455
    , 459 (8th Cir. 2006), rev’g 
    123 T.C. 85
    , 101 (2004); Keller v. Commissioner, 
    568 F.3d 710
    , 718 (9th Cir. 2009),
    aff’g in part T.C. Memo. 2006-166, and aff’g in part, vacating in part decisions in
    related cases. Goldberg resided in Illinois when he filed his petition. Therefore
    our decision will not be appealable to the First, Eighth, or Ninth Circuit. See sec.
    7482(a)(1), (b)(1). Therefore, we employ a de novo scope of review. Applying a
    - 19 -
    [*19] de novo scope of review means that the Court considers evidence not in the
    administrative record.3 Robinette v. Commissioner, 
    123 T.C. 101
    .
    In a Tax Court proceeding, the taxpayer has the burden of proof. Rule
    142(a).
    We now explain the procedural history of this case relevant to determining
    what issues are properly before the Court.4
    Goldberg and his wife filed joint income-tax returns for 2003 and 2004.
    They reported that they owed no tax for either year.
    In 2007 the IRS began an examination of the Goldbergs’ 2003 and 2004
    returns. Revenue Agent Julie Knighton performed the examination. We refer to
    her as RA Knighton.
    On May 11, 2011, the examination ended with RA Knighton’s preparing a
    Form 4549, “Income Tax Examination Changes”, and the Goldbergs’ signing the
    3
    In cases where our jurisdiction is granted by sec. 6404(h)(1), we apply a de
    novo scope of review. See, e.g., Goettee v. Commissioner, T.C. Memo. 2003-43,
    supplemented by T.C. Memo. 2004-9, aff’d, 192 F. App’x 212 (4th Cir. 2006);
    Jean v. Commissioner, T.C. Memo. 2002-256; Jacobs v. Commissioner, T.C.
    Memo. 2000-123; see also Porter v. Commissioner, 
    130 T.C. 115
    , 122-123 (2008)
    (noting de novo scope of review for cases brought under sec. 6404(h)(1)).
    4
    The discussion of the procedural history that follows includes some of our
    findings of fact. The Court also adopts the parties’ stipulation of facts as findings
    of fact. Other findings of fact are stated infra part III, in which we discuss
    Goldberg’s entitlement to interest abatement under sec. 6404(e)(1).
    - 20 -
    [*20] form. We have referred to this as the May 2011 Form 4549. There were
    prior drafts of this Form 4549, but these drafts are not relevant to what issues are
    properly before the Court. Therefore these drafts are not discussed in this part of
    the opinion regarding which issues are properly before the Court. These drafts are
    relevant to Goldberg’s entitlement to interest abatement under section 6404(e)(1).
    They are discussed infra part III.EE, which is the part of the opinion in which we
    discuss Goldberg’s entitlement to interest abatement under section 6404(e)(1) for
    the period of January 13 through February 15, 2011 (Period 19).
    The May 2011 Form 4549 had pre-printed lines to show the following three
    amounts due for each tax year: (1) tax, (2) penalties, and (3) interest. For each tax
    year the tax due was shown on line 19.a, the penalties due were shown on line
    19.b, and the interest due was shown on line 19.c. For 2003, line 19.a showed the
    tax due as $10,557; line 19.b (for penalties) was blank; and line 19.c showed the
    interest due “computed to 05/29/2011” as zero (specifically “0.00”). The sum of
    all three amounts due was shown as $10,557. For 2004, line 19.a showed the tax
    due as $46,865; line 19.b (for penalties) was blank; and line 19.c showed the
    interest due “computed to 05/29/2011” as zero (specifically “0.00”). The sum of
    all three amounts due was shown as $46,865. Below these amounts was the name
    - 21 -
    [*21] of the revenue agent, RA Knighton. Below that, the Goldbergs signed the
    following statement:
    I give my consent to the immediate assessment and collection of any
    increase in tax and penalties, and accept any decrease in tax and
    penalties shown above, plus additional interest as provided by law. It
    is understood that this report is subject to acceptance by the Area
    Director, Area Manager, Specialty Tax Program Chief, or Director of
    Field Operations.
    The statement is a consent to the immediate assessment of the taxes and penalties
    shown on the form. See Evans v. Commissioner, T.C. Memo. 1999-66, slip op. at
    10 (“By executing the Form 4549, petitioner merely consented to the immediate
    assessment and collection of the deficiency proposed therein.” (Emphasis added.)).
    In its opening brief, the IRS argues that the statement should also be interpreted as
    a consent to the assessment of interest on the Goldbergs’ 2004 income-tax
    liability. The IRS’s explanation is as follows:
    Accordingly, while petitioner’s consent to the assessment of tax and
    penalties was limited to the dollar amounts “shown above” on the
    Form 4549, petitioner’s consent to the assessment of interest was not
    limited to the dollar amounts “shown above” on the Form 4549. To
    the contrary, petitioner agreed that interest would be assessed “as
    provided by law.”
    Goldberg argues that the May 2011 Form 4549 was a contract, and that
    under the terms of the alleged contract, he owed no interest because of the 0.00
    entered in the line for interest. He does not directly address the legal effect of the
    - 22 -
    [*22] terms “shown above” or “as provided by law”.5 However, he has other
    arguments about the legal effect of the May 2011 Form 4549 (i.e., his third, fourth,
    and fifth arguments referred to supra part I, pp. 10-11).
    The $46,865 of tax shown for 2004 on the May 2011 Form 4549 resulted
    from various adjustments to the Goldbergs’ income asserted in the May 2011
    Form 4549. One of these adjustments was an increase in income related to the
    Goldbergs’ S corporations’ participation in a Niche section 419A plan and a
    Greater Metropolitan Benefits plan.
    On August 1, 2011, the IRS issued the Goldbergs a notice that it had
    assessed them interest for tax year 2004 in the amount of $20,210.27.
    On August 23, 2011, the Goldbergs paid $50,000 to the IRS. The $50,000
    payment was applied in part against the non-interest component of their 2004 tax
    liability (and completely eliminated the non-interest component of their 2004 tax
    liability). The remainder of the $50,000 was applied to reduce (but not eliminate)
    the balance of the $20,210.27 of assessed interest for 2004.
    5
    Our view of the significance of the statement from the May 2011 Form
    4549 excerpted above is explained infra part II.
    - 23 -
    [*23] On September 5, 2011, the IRS mailed Goldberg a Letter 1058, “Final
    Notice of Intent to Levy and Notice of Your Right to a Hearing”.6 The letter was
    delivered to Goldberg on September 8, 2011. The letter stated that the IRS
    intended to levy to collect from Goldberg for his and his wife’s joint income-tax
    liabilities for 2003 and 2004. For 2004, the letter stated that the amounts sought to
    be collected were an assessed balance of $67,075.27, accrued interest of $486.90,
    and a late payment penalty of $436.86. These three amounts totaled $67,999.03.
    The computations of these amounts apparently did not take into account the
    Goldbergs’ $50,000 payment described in the paragraph above.
    The September 5, 2011 Letter 1058 offered Goldberg an opportunity to
    request a CDP hearing. Attached to the Letter 1058 was a Form 12153, “Request
    for a Collection Due Process or Equivalent Hearing”, which can be used to request
    a CDP hearing. Goldberg did not return the Form 12153 to the IRS.
    Instead, on or around September 9, 2011, Goldberg filed a Form 843,
    “Claim for Refund and Request for Abatement”. In the Form 843, Goldberg stated
    that there had been managerial delays during the examination. He checked the
    box labeled “Interest was assessed as a result of IRS errors or delays”, which is
    6
    This September 5, 2011 mailing of the Letter 1058 and all events from
    August 24, 2011, through June 26, 2013, are detailed infra part III.JJ.2 (Period
    22).
    - 24 -
    [*24] essentially a box for taxpayers to check to assert that they are entitled to
    interest abatement under section 6404(e)(1). In addition to his claim for interest
    abatement, Goldberg contended that the income adjustment in the May 2011 Form
    4549 regarding the Niche section 419A and Greater Metropolitan Benefits plans
    was in error because it was contrary to the April 29, 2011 stipulation of settled
    issues in the Tax Court case Captain Douglas J. Brown, Inc., a consolidated case
    involving deficiency actions by 121 petitioners. See Stipulation of Settled Issues
    at Ex. A, Captain Douglas J. Brown, Inc. v. Commissioner, T.C. Dkt. No.
    30453-08. Neither of the Goldbergs was among those petitioners, see
    id., and Rule
    91(e) provides such stipulations “shall be binding and have effect only in the
    pending case and not for any other purpose”. The IRS eventually denied the
    claims made on the Form 843 that Goldberg filed.7 Neither party argues that the
    Form 843 filed by Goldberg constituted a request for a CDP hearing. Our
    resolution of the case does not depend on whether the Form 843 constituted a
    request for a CDP hearing.
    On October 30, 2012, the IRS filed a notice of lien with Lake County,
    Illinois, against Goldberg’s property. According to the notice of lien, its purpose
    7
    We detail the denial and the events surrounding the denial (in the May 28,
    2013 notice of determination) in Period 22, infra part III.JJ.2.e.
    - 25 -
    [*25] was to secure collection of a $17,071.22 unpaid balance of Federal income-
    tax liabilities for 2004. This amount appears to be the balance of the unpaid
    interest that had accrued on the Goldbergs’ 2004 underpayment less a portion of
    the Goldbergs’ $50,000 payment that they had made on August 23, 2011. The
    lien-notice filing is discussed in more detail in Period 22, infra part III.JJ.2.c.
    On November 1, 2012, the IRS sent a notice to Goldberg that it had filed the
    notice of lien on October 30, 2012. This notice gave Goldberg another
    opportunity to request a CDP hearing with the Office of Appeals.
    On November 14, 2012, Goldberg used a Form 12153 to timely request a
    CDP hearing in response to the November 1, 2012 lien-filing notice.8 In the
    request, Goldberg contended that he was entitled to abatement of interest because
    of alleged unreasonable errors and delays by the IRS in processing his Form 843.
    Goldberg described the alleged unreasonable errors or delays in processing his
    Form 843 thus:
    * * * [Goldberg] filed the [Form] 843 at the recommendation of the
    * * * [IRS] in September of 2011. * * * [Goldberg] also filed a
    request for abatement [of interest] at the direction of the * * * [IRS]
    as * * * [the Goldbergs] had a contract which stated “zero interest”.
    The * * * [Goldbergs] received several letters from [the IRS’s]
    collections [unit] stating over and over that it needed more time to
    process [Goldberg’s] request. * * *
    8
    This hearing is discussed in more detail in Period 22, infra part III.JJ.2.d.
    - 26 -
    [*26] *          *          *          *         *          *          *
    [I]n October 2012, almost 13 months later * * * [Goldberg’s Form]
    843 was answered by * * * [an] Interest Abatement Coordinator * * *
    Thus, the request for interest abatement in the Form 12153 appeared to correspond
    to the interest accruing after the date that Goldberg submitted his Form 843 to the
    IRS (on or around September 9, 2011). Goldberg also contended in the Form
    12153 that the income adjustment in the May 2011 Form 4549 regarding the Niche
    section 419A plan was in error because the adjustment was inconsistent with the
    stipulation of settled issues in Captain Douglas J. Brown, Inc. As a result of this
    error, Goldberg contended in the Form 12153, there was no deficiency for 2004
    and there was no interest for 2004. In addition, Goldberg contended in the Form
    12153 that the IRS had agreed, as a result of the “0.00” on line 19.c of the May
    2011 Form 4549, that there was no interest liability for tax year 2004. In this
    Form 12153, Goldberg did not refer to the adjustments relating to the Greater
    Metropolitan Benefits plan.
    Goldberg’s CDP hearing was handled by Marcus Morgan, an Appeals
    officer.
    On May 28, 2013, the Office of Appeals issued a notice of determination
    regarding the CDP hearing concerning the notice of lien filing. The notice of
    - 27 -
    [*27] determination rejected Goldberg’s argument that the “0.00” amount on line
    19.c of the May 2011 Form 4549 fixed the interest due for 2004 at zero.
    Addressing Goldberg’s interest-abatement claim, the notice of determination
    stated:
    You also advised that you filed an abatement of interest claim via
    Form 843, but you really filed an abatement of tax claim (as
    confirmed by reviewing the form). The interest abatement unit
    confirmed that they closed the case because abatement of interest was
    not at issue.
    The notice of determination thus characterized Goldberg’s Form 843 interest-
    abatement claim as a tax-abatement claim and denied him relief. Because the
    notice characterized his Form 843 claim as tax-abatement claim, it seems to have
    declined to address the merits of his claim for interest abatement under section
    6404(e). Nor did the notice of determination specifically address the Captain
    Douglas J. Brown, Inc. argument. However, the notice of determination did state
    that Goldberg was generally precluded from disputing his “liability” in the CDP
    hearing because he had already had a prior opportunity to do so when he received
    the Letter 1058.
    On June 26, 2013, Goldberg filed a timely petition for the Court to review
    the May 28, 2013 determination of the Office of Appeals.
    - 28 -
    [*28] The IRS moved to remand the case to the Office of Appeals. The motion
    stated that the Office of Appeals had erroneously refused to consider whether
    Goldberg was entitled to interest abatement. On December 17, 2013, the Court
    granted the motion and remanded the case to the Office of Appeals to make a
    supplemental determination. On remand, Appeals Officer Kathy Keen was
    assigned by the Office of Appeals to handle the hearing.
    After the case was remanded, Goldberg made a Freedom of Information Act
    request pursuant to 5 U.S.C. sec. 552 (2012), in which he sought (among other
    things) the examination records of the revenue agent who examined his joint 2004
    income-tax return. Goldberg received these records. Using these records, he
    developed a list of 22 periods for which he sought interest abatement and the
    reasons for which he sought interest abatement for each period. We refer to this
    list as the 2004 Abatement Schedule. Each period was delineated by Goldberg
    with a start date and an end date. The periods on the 2004 Abatement Schedule
    are as follows:
    - 29 -
    [*29]
    Date period
    Period number           begins           Date period ends     Number of days
    Period 1          9/12/2007             9/20/2007a               9
    Period 2         9/20/2007a              9/27/2007               8
    Period 3          12/1/2007             1/31/2008a              62
    Period 4         1/31/2008a             3/11/2008a              41b
    Period 5         3/11/2008a              4/28/2008              49b
    Period 6          7/18/2008              7/30/2008              13
    Period 7          8/8/2008               8/16/2008               9
    Period 8          8/27/2008              9/4/2008a               9
    Period 9          9/4/2008a              9/22/2008              19
    Period 10         9/23/2008              9/25/2008               3
    Period 11         9/29/2008             11/13/2008              46
    Period 12         5/29/2009              6/8/2009               11
    Period 13         6/10/2009              6/15/2009              6b
    Period 14         6/20/2009             7/27/2009a              38
    Period 15        7/27/2009a               8/9/2010             379b
    Period 16        11/15/2010             12/8/2010a              24
    Period 17        12/8/2010a               1/3/2011              27
    Period 18         1/7/2011c              1/10/2011               4
    Period 19         1/13/2011              2/15/2011              34b
    Period 20         3/29/2011              4/15/2011              18
    Period 21         4/29/2011              8/23/2011             117b
    Period 22         8/24/2011              6/26/2013             673b
    a
    These dates are listed twice in the 2004 Abatement Schedule. Though
    there is overlap between periods, when Goldberg listed a date as occurring within
    two different periods, he gave a different reason for interest abatement for the
    different periods. To consider his different arguments for abating interest for the
    same dates, we replicate his date ranges in our analysis.
    b
    The actual 2004 Abatement Schedule miscalculated the number of days for
    each of these periods. We have noted these miscalculations, in certain footnotes in
    part III, infra. The number of days in the table are the actual number of days
    between the start and end dates even if the number of days in the table is different
    - 30 -
    [*30] from than the number of days stated by Goldberg for the period in his 2004
    Abatement Schedule.
    c
    In this cell, Goldberg actually wrote “1/7/2010”, but he requested four days
    of interest abatement. It seems that the entry of a 2010 date was a typographical
    error, and Goldberg appears to have intended to write “1/7/2011”.
    The period numbers are assigned by the Court for convenience. The
    number of days in each period includes the beginning and the ending dates.
    Goldberg submitted the 2004 Abatement Schedule to Keen, who initially
    referred his request for interest abatement to an IRS interest-abatement coordinator
    named Lindsay O’Neil. O’Neil concluded that Goldberg was not entitled to
    interest abatement for any of the 22 periods. The parties have stipulated that
    O’Neil conveyed her conclusions to Keen and that Keen reviewed O’Neil’s
    conclusions. However, the parties did not stipulate what method was used to
    communicate these conclusions. Nor does the record show what method of
    communication was used.
    O’Neil documented her progress in evaluating Goldberg’s claim for interest
    abatement in a document titled “Interest Abatement Activity Record”. There,
    O’Neil wrote that she had been told to draw an “initial conclusion” about whether
    Goldberg was entitled to interest abatement and to convey this initial conclusion to
    the Office of Appeals “via memorandum”.
    - 31 -
    [*31] According to the Interest Abatement Activity Record, after O’Neil had
    finished her review, she created a .zip file to convey her conclusions and the
    information she used in making those conclusions. She sent this .zip file to Keen,
    who followed up with O’Neil to ask questions.
    According to O’Neil’s Interest Abatement Activity Record, the .zip file
    included the following documents: “Form 886-A”, “reviewer timeline”, “inv
    control”, three of RA Knighton’s activity records,9 the information document
    requests sent by RA Knighton, and “a couple of * * * [RA Knighton’s] letters”.
    Of the .zip file documents, one of RA Knighton’s three activity records (for her
    examination of the Goldbergs’ returns) is in the record. 
    See supra
    note 9. The
    record does not contain the other two activity records that RA Knighton made.
    Some of RA Knighton’s correspondence with Goldberg is in the record, but we do
    not know specifically to which “letters” O’Neil referred. None of the information
    document requests is in the record.10 The “inv control” appears to mean an
    9
    Specifically the activity records are described as “activity records for all 3
    entities”. We assume that “all 3 entities” refers to the Goldbergs, Wireless
    Distributors, Inc., and another S corporation that was also wholly owned by the
    Goldbergs. We discuss Wireless Distributors, Inc. and the other wholly owned S
    corporation infra part III.A, pp. 55-58.
    10
    We discuss the contents of the information document requests and how we
    have determined their contents infra part III.A, p. 59.
    - 32 -
    [*32] inventory control document, which is not in the record. The “Form 886-A”
    is not in the record. We cannot determine whether the “reviewer timeline”11 is in
    the record.
    For CDP determinations that we review for abuse of discretion, we must
    determine whether the Appeals officer’s determination lacked a sound basis in fact
    or law. Woodral v. Commissioner, 
    112 T.C. 19
    , 23 (1999). To do so, we
    scrutinize the Office of Appeals’ reasoning underlying its determination and
    consequently the information it relied on in arriving at its determination. See
    Magana v. Commissioner, 
    118 T.C. 488
    , 493-494 (2002). At first blush, there are
    two types of gaps in the record that present the possibility that there is not enough
    information in the record to determine whether the Office of Appeals abused its
    discretion in denying Goldberg interest abatement. The first type of gap is that we
    do not know which fact-type documents Keen received from O’Neil. By fact-type
    documents, we mean the documents, used by Keen in making her determination,
    related to the events relevant to Goldberg’s claims. For example, we do not know
    which of RA Knighton’s letters O’Neil sent Keen. The second type of gap is that
    we do not know the contents of the analysis-type documents that O’Neil sent to
    11
    It is possible that the spreadsheet at Exhibit 83-J is the “reviewer timeline”
    that O’Neil mentioned in the Interest Abatement Activity Record. However, as we
    explain infra, we need not determine whether it is.
    - 33 -
    [*33] Keen. By analysis-type documents we mean the documents possibly relied
    on by Keen showing O’Neil’s analysis of the claims for interest abatement that
    Goldberg made in his supplemental CDP hearing. For example, we cannot
    determine the contents of the “Form 886-A” or the “reviewer’s timeline” because
    the “Form 886-A” is not in the record, and it is not clear that the “reviewer’s
    timeline” is in the record. And neither document’s contents are described in the
    record. However, neither of these two types of gaps prevents us from determining
    whether the Office of Appeals abused its discretion.
    We first address two concerns that arise because we do not know all of the
    fact-type documents upon which Keen relied. The first concern is that Keen may
    have relied on fact-type documents that are not in the record (i.e., Keen reviewed
    documents that the Court has not reviewed). Goldberg has not argued that the
    record is incomplete for this reason. We therefore treat the argument that the
    record is incomplete for this reason as having been waived. See Mendes v.
    Commissioner, 
    121 T.C. 308
    , 312-313 (2003).
    The second concern regarding fact-type documents is that the record
    contains fact-type documents upon which Keen did not rely. Here, Goldberg has
    had a proper opportunity for a hearing at the Office of Appeals on the issue of
    interest abatement (i.e., the supplemental hearing), and the record before the Court
    - 34 -
    [*34] is sufficient to allow us to decide whether the Office of Appeals abused its
    discretion in denying Goldberg interest abatement. See Lunsford v.
    Commissioner, 
    117 T.C. 183
    , 189 (2001); see also Rivas v. Commissioner, T.C.
    Memo. 2017-56, at *9-*12. Neither party has argued that the record contains fact-
    type documents that Keen never received or considered. We treat as waived any
    argument that the record impermissibly includes fact-type documents upon which
    Keen never relied. See Mendes v. Commissioner, 
    121 T.C. 312-313
    .
    Nor are we prevented from reviewing the supplemental determination by
    any uncertainty as to the analysis-type documents upon which Keen relied. The
    supplemental notice of determination ultimately denied Goldberg interest
    abatement for each of the 22 periods for which he sought it. Keen authored an
    “Appeals Case Memo” that details her determinations in the supplemental notice
    of determination. The Appeals Case Memo is appended to the supplemental
    notice of determination. In the Appeals Case Memo, Keen adequately articulates
    her reasons for denying interest abatement for all 21 periods that the notice denied
    and that have not been conceded by the IRS.12 Neither party urges the Court to
    12
    For Period 21, which is conceded by the IRS, Keen wrote in the Appeals
    Case Memo that she believed Goldberg was entitled to interest abatement for that
    period. Period 21 is coterminous with the 117-day period between the Goldbergs’
    signing the May 2011 Form 4549 and their receiving a notice stating interest had
    (continued...)
    - 35 -
    [*35] focus on O’Neil’s decisions and analysis. Under section 6330(d)(1), we
    review the Office of Appeals’ final determination as to issues raised in a CDP
    hearing. The final determination was not contained in anything that O’Neil
    provided Keen. The final determination regarding Goldberg’s entitlement to
    interest abatement was the supplemental notice of determination. See Kelby v.
    Commissioner, 
    130 T.C. 86-87
    . Therefore, there is no need to consider what
    analysis documents were relied on by Keen, and we review the supplemental
    determination.
    The supplemental determination denied Goldberg interest abatement for
    each of the 22 periods for which he sought interest abatement. With the exception
    of Period 22 (August 24, 2011, through June 26, 2013) and Period 21 (which has
    been conceded), the Appeals Case Memo did not discuss each period specifically.
    Instead, the memorandum addressed the periods in the aggregate. The
    memorandum acknowledged that there was “evidence of delay on the part of both
    parties.” However, the memorandum stated the delays did not entitle Goldberg to
    12
    (...continued)
    been assessed. Keen wrote that before she finalized the supplemental notice of
    determination, she “offered” interest abatement for this period to Goldberg, but he
    “declined” it. It is not clear from Keen’s notes or any other part of the record what
    she wanted from Goldberg in exchange for her “offer”. However, because Period
    21 has been conceded, we do not need to review Keen’s reasons for denying
    interest abatement for that period.
    - 36 -
    [*36] interest abatement because (1) “there [we]re no unreasonable errors or
    delays by the * * * [IRS] in the performance of a ministerial or managerial act”
    and (2) certain delays were attributable to Goldberg.13 It also reiterated the
    conclusion in the original notice of determination that the May 2011 Form 4549
    did not constitute a binding contract, meaning the “0.00” entered in line 19.c did
    not absolve Goldberg and his wife of liability for statutory interest.
    The Appeals Case Memo did not take the position that Goldberg’s claim for
    interest abatement should be considered only for interest accruing during the times
    specified in his November 14, 2012 request for a CDP hearing. In that request
    Goldberg seemed to request interest abatement for the period starting with
    September 9, 2011 (the approximate date on which he submitted his Form 843 to
    the IRS). The IRS on brief does not take the position that Goldberg’s claims for
    interest abatement should be entertained by the Court only for interest accruing
    during the times specified in his November 14, 2012 request for a CDP hearing.
    We conclude that it is proper for us to review claims for interest abatement for
    periods before September 9, 2011. However, we review only the periods that
    13
    The Appeals Case Memo gives examples of delays by Goldberg. The
    memorandum states that at various points Goldberg delayed in providing RA
    Knighton with information about the Niche sec. 419A plan, the Greater
    Metropolitan Benefits plan, and the Goldbergs’ bases in their S corporations.
    - 37 -
    [*37] Goldberg raised at the Office of Appeals and for which the supplemental
    notice of determination disallowed interest abatement. See sec. 301.6330-1(f)(2),
    Q&A-F3, Proced. & Admin. Regs. Therefore, we limit our review to Periods
    1-22.
    On July 21, 2016, Goldberg moved for the Court to again remand the case
    to the Office of Appeals. Goldberg asked that the Court order the Office of
    Appeals on remand to consider his argument that the income adjustment in the
    May 2011 Form 4549 regarding the Niche section 419A plan was in error because
    it was contrary to the stipulation of settled issues in Captain Douglas J. Brown,
    Inc.
    On September 21, 2016, the Court denied Goldberg’s July 21, 2016 motion
    to remand. The order stated that Goldberg’s Captain Douglas J. Brown, Inc.
    argument was a challenge to the “underlying tax liability”, see sec. 6330(c)(2)(B),
    and that he was barred from pressing the argument in the CDP hearing because he
    had had a prior opportunity to do so. The order reasoned that had Goldberg not
    signed the May 2011 Form 4549, the IRS would have been required to issue him a
    notice of deficiency, and this notice of deficiency would have permitted him to
    petition the Tax Court to redetermine the deficiency. See Aguirre v.
    Commissioner, 
    117 T.C. 327
    ; Hall v. Commissioner, T.C. Memo. 2013-93,
    - 38 -
    [*38] at *10-*11. In that deficiency litigation Goldberg could have asserted the
    Captain Douglas J. Brown, Inc. argument.
    We held a trial in Chicago, Illinois, on October 26, 2016. After trial, the
    parties submitted briefs on whether the Tax Court should sustain the notice of
    determination as supplemented. Goldberg again presses his Captain Douglas J.
    Brown, Inc. argument. As we explained in our prior order that is referred to in the
    paragraph above, Goldberg’s Captain Douglas J. Brown, Inc. argument is a
    challenge to the underlying tax liability, he had a prior opportunity to make the
    challenge, he waived that opportunity, and he is barred from making this
    argument. We have already addressed this argument by order. We do not address
    it again.
    On brief, Goldberg also contends that the May 2011 Form 4549 embodies a
    binding contract between the Goldbergs and the IRS and that the “0.00” in line
    19.c is a term in the contract which prohibits the IRS from assessing interest
    liability for tax year 2004. We term this argument the Form-4549-as-a-contract
    argument. The IRS does not argue that Goldberg is precluded from making the
    Form-4549-as-a-contract argument by the prior opportunity provision of section
    6330(c)(2)(B), which we discussed supra part I, p. 14. Therefore we treat the
    prior-opportunity argument as waived. See Mendes v. Commissioner, 121 T.C.
    - 39 -
    [*39] at 312-313. Nor does the IRS make any other contention as to why we
    cannot consider Goldberg’s Form-4549-as-a-contract argument. Under these
    circumstances, we will consider the argument. We determine that Goldberg loses
    the argument on the merits. See infra pt. II.
    Goldberg also contends that he is entitled to interest abatement for the 22
    periods for which it was denied in the supplemental notice of determination. He
    argues that he is entitled to interest abatement because of alleged unreasonable
    errors and delays by the IRS. Goldberg’s interest-abatement claim was made to
    the Office of Appeals pursuant to a CDP hearing, and it was denied in a
    supplemental notice of determination. His interest-abatement claim is a challenge
    to the liability that the IRS seeks to collect through the lien-notice filing. This
    argument is properly before the Court. See infra pt. III.
    On brief, Goldberg for the first time makes the following arguments: the
    IRS is “equitably estopped” from assessing interest on the deficiency because the
    IRS was bound to the “0.00” in line 19.c of the May 2011 Form 4549; Goldberg is
    entitled to relief under the doctrine of promissory estoppel because he and his wife
    detrimentally relied on the interest being fixed at “0.00”; and, in the alternative,
    the May 2011 Form 4549, as a “contract”, should be set aside and declared void by
    the Tax Court because he and his wife were induced to enter into it due to RA
    - 40 -
    [*40] Knighton’s alleged fraud or misrepresentation. Because Goldberg did not
    raise these arguments at the CDP hearing, we do not address them. See sec.
    301.6330-1(f)(2), Q&A-F3, Proced. & Admin. Regs.
    On brief, the IRS conceded that Goldberg was entitled to interest abatement
    for Period 21, which spanned April 29 through August 23, 2011.14 Because of this
    concession, the number of periods for which we must evaluate the Office of
    Appeals’ determination not to abate interest is reduced from the 22 periods in the
    2004 Abatement Schedule to 21 periods.
    The notice of determination was issued on May 28, 2013. Goldberg filed
    his petition on June 26, 2013, which is within 30 days of the initial notice of
    determination. Therefore we have jurisdiction under section 6330(d)(1) to review
    the determination as supplemented. See LG Kendrick, LLC v. Commissioner, 
    146 T.C. 36
    ; Kelby v. Commissioner, 
    130 T.C. 87-88
    .
    The petition is also within the 180-day period for filing suit to review an
    IRS denial of interest abatement. See sec. 6404(h). It is unnecessary, however,
    for us to determine whether we have jurisdiction under section 6404(h). See
    Roudakov v. Commissioner, T.C. Memo. 2017-121, at *7-*12 (holding
    14
    This is the same period for which Keen “offered” Goldberg interest
    abatement before issuing the supplemental notice of determination. 
    See supra
    note
    12.
    - 41 -
    [*41] jurisdiction granted by sec. 6330(d)(1)); Norman v. Commissioner, T.C.
    Memo. 2016-98, at *8-*10 (same). Jurisdiction under section 6404(h) would not
    add to the issues we would resolve, nor would it affect the standard or scope of
    review for resolving these issues.
    II.   The Form-4549-as-a-contract argument
    We turn to the merits of Goldberg’s argument that the “0.00” entry on the
    May 2011 Form 4549 constituted a term in a binding contract relieving the
    Goldbergs of interest on their 2004 income-tax balance. Goldberg raised this
    argument at his CDP hearing, at his supplemental CDP hearing, and in his briefs.
    Goldberg’s contract argument is an argument that he is not liable for interest on
    his 2004 underpayment of tax. Because this interest is the liability the IRS seeks
    to collect, Goldberg’s contract argument is a “challenge to the underlying tax
    liability”. Sec. 6330(c)(2)(B); Urbano v. Commissioner, 
    122 T.C. 393
    .
    Furthermore, Goldberg’s contract argument does not involve section 6404(e)(1).
    Therefore, we review de novo the determination of the Office of Appeals as to
    Goldberg’s contract argument. Montgomery v. Commissioner, 
    122 T.C. 8
    ;
    Goza v. Commissioner, 
    114 T.C. 181-182
    ; cf. Krehnbrink v. Commissioner,
    at *17 (applying abuse-of-discretion standard to sec. 6404(e) interest-abatement
    - 42 -
    [*42] claims made in a CDP hearing); Estate of La Sala v. Commissioner,
    at *16-*17 (same).
    Below we excerpt relevant parts of the May 2011 Form 4549:
    ***
    ***
    We now discuss the excerpts from the May 2011 Form 4549. The form
    does not literally state that there is a deficiency. However, the “amounts due”
    match the definition of “deficiency”, so essentially the Form 4549 shows
    deficiencies. See sec. 6211(a). The deficiencies were $10,557 for 2003 and
    $46,865 for 2004. The deficiencies came from various adjustments to income.
    - 43 -
    [*43] The May 2011 Form 4549 stated negative and positive adjustments to the
    Goldbergs’ 2004 income-tax liabilities. The negative adjustments included (1) the
    Goldbergs’ two net-operating-loss (NOL) carrybacks from 2006 to 2004 (one
    carryback from Goldberg’s 2006 year, and one carryback from his wife’s 2006
    year) totaling $2,290,009 and (2) a $7,664 increase in the allowance of itemized
    deductions. The positive adjustments included (1) a disallowance of a loss in the
    amount of $645,162; (2) an NOL carryover recapture from 2003 in the amount of
    $415,334; (3) an adjustment of $394,091 related to the Goldbergs’ S corporations’
    participation in a Niche section 419A plan;15 and (4) an adjustment of $601,328
    related to the Goldbergs’ S corporations’ participation in a Greater Metropolitan
    Benefits plan.
    Line 19.c of the May 2011 Form 4549 stated that, for tax year 2004,
    “Interest (IRC § 6601)--computed to 05/29/2011” is equal to “0.00”.
    On April 29, 2011 RA Knighton signed the May 2011 Form 4549. On May
    11, 2011, the Goldbergs signed the form. Directly above the Goldbergs’
    signatures on the form was the following statement:
    15
    We noted supra part I, p. 37, that Goldberg argued that this case ought to
    be remanded to the Office of Appeals because, Goldberg alleged, the income
    adjustment was contrary to the stipulation of settled issues in Captain Douglas J.
    Brown, Inc. v. Commissioner, T.C. Dkt. No. 30453-08 (Apr. 29, 2011).
    - 44 -
    [*44] Consent to Assessment and Collection--I do not wish to exercise my
    appeal rights with the Internal Revenue Service or to contest in the
    United States Tax Court the findings in this report. Therefore, I give
    my consent to the immediate assessment and collection of any
    increase in tax and penalties, and accept any decrease in tax and
    penalties shown above, plus additional interest as provided by law. It
    is understood that this report is subject to acceptance by the Area
    Director, Area Manager, Specialty Tax Program Chief Counsel, or
    Director of Field Operations.
    As explained below, the significance of this statement is that it is a waiver of the
    restrictions on assessment.
    In general, the IRS may not collect a tax until the tax has been formally and
    timely assessed. See sec. 6502(a). To assess an unreported amount of tax (i.e., a
    deficiency) the IRS must mail the taxpayer a notice of deficiency, and it must
    ordinarily wait 90 days, or if the taxpayer files a petition with the Tax Court, it
    must wait until the decision of the Tax Court becomes final. Secs. 6212(a),
    6213(a). Underpayment interest, provided for by section 6601, “shall be assessed,
    collected, and paid in the same manner as taxes.” Sec. 6601(e)(1). Therefore, the
    collection of interest can only follow an assessment of interest. Secs. 6502(a),
    6601(g). Under section 6502(a)(1), the period of limitations on the collection of
    tax begins on the date the IRS assesses the tax. Under section 6601(g), the IRS
    may assess interest “at any time during the period within which the tax to which
    such interest relates may be collected.” Therefore the assessment of interest may
    - 45 -
    [*45] occur only after the assessment of “the tax to which such interest relates”.
    Secs. 6502(a)(1), 6601(g); see also 
    Field, 381 F.3d at 113
    (“Since the IRS’s
    assessment of interest against * * * [the taxpayer-plaintiff] coincided with the
    commencement of the collection period, the assessment [of the interest] was no
    doubt timely.”); Priv. Ltr. Rul. 201319017 (May 10, 2013) (“[T]he Service cannot
    assess additional interest on * * * [a] tax liability that was never actually
    assessed.”).
    By executing a Form 4549, a taxpayer waives some of the restrictions on
    assessment of the tax and the interest to which the tax relates. Aguirre v.
    Commissioner, 
    117 T.C. 327
    . Specifically, the taxpayer (1) waives pre-
    assessment review by the Office of Appeals or the Tax Court, (2) waives the right
    to receive a notice of deficiency, (3) consents to the immediate assessment and
    collection of the tax shown on the form, and (4) consents to the immediate
    assessment and collection of the “additional interest” imposed on the tax as
    “provided by law”. Section 6601 provides that taxpayers are liable for interest on
    underpayments of tax that are not paid “on or before the last date prescribed for
    payment”. Sec. 6601(a). If a Form 4549 shows a positive adjustment to the
    taxpayer’s tax liability (i.e., a deficiency), by operation of section 6601 interest
    will accrue on the deficiency from the date payment was due. Sec. 6601(a). A
    - 46 -
    [*46] taxpayer whose deficiency is subject to interest under section 6601 and who
    signs the Form 4549 thus consents to the immediate assessment and collection of
    the deficiency and the interest on that deficiency.
    Goldberg seems to contend that the effect of his and his wife’s execution of
    the May 2011 Form 4549 was to permanently fix their liability for interest at zero
    because line 19.c stated that, for the tax year 2004, “Interest (IRC § 6601)--
    computed to 5/29/2011” is equal to “0.00”. This is not the effect of their signing
    the May 2011 Form 4549. Instead, by signing the May 2011 Form 4549, the
    Goldbergs consented to the immediate assessment and collection of two amounts
    related to their 2004 tax liability: (1) the 2004 deficiency of $46,865 shown on the
    May 2011 Form 4549 and (2) the “additional interest” on the deficiency “as
    provided by law”.
    The Goldbergs gave their consent “to the immediate assessment and
    collection of * * * additional interest as provided by law.” (Emphasis added.)
    The word “additional” means “in addition to” something else. See Air Transp.
    Ass’n of Am. v. Lenkin, 
    899 F.2d 1265
    , 1266 (D.C. Cir. 1990). Applying this
    definition of “additional” to interpret the Form 4549, “additional interest” means
    interest “in addition to” the interest shown on the Form 4549. Combined with “as
    provided by law”, the phrase “additional interest as provided by law” means
    - 47 -
    [*47] interest in addition to the interest shown on the Form 4549 if that interest
    applies by operation of law. The $46,865 deficiency was an underpayment of tax.
    By law, section 6601 imposes interest on underpayments of tax, and that interest
    begins to accrue on the “last date prescribed for payment”. Sec. 6601(a). Thus, by
    executing the May 2011 Form 4549, the Goldbergs consented to the immediate
    assessment and collection of the interest that section 6601 imposed on the $46,865
    deficiency.
    Goldberg’s argument that the interest was permanently fixed at zero fails
    because it is contrary to the terms of the waiver and consent in the May 2011 Form
    4549 that he and his wife signed. If the Goldbergs had intended to permanently
    fix their interest liability at zero, they could have entered into a closing agreement,
    which is subject to the requirements of section 7121. See Urbano v.
    Commissioner, 
    122 T.C. 393
    -394.
    Section 7121 and the regulations thereunder set forth the exclusive means
    and procedures by which an agreement between the IRS and a taxpayer concerning
    the latter’s tax liability may be accorded finality. See, e.g., Urbano v.
    Commissioner, 
    122 T.C. 393
    -394; Hudock v. Commissioner, 
    65 T.C. 351
    , 362
    (1975). An agreement made pursuant to section 7121 for any taxable period is
    final and binding on both the taxpayer and the IRS if the agreement complies with
    - 48 -
    [*48] the procedures in section 7121 and the regulations thereunder. Agreements
    made pursuant to section 7121 are referred to as closing agreements. See sec.
    7121; sec. 601.202(b), Statement of Procedural Rules; sec. 301.7121-1(a), (d)(1),
    Proced. & Admin. Regs. Section 301.7121-1(d)(1), Proced. & Admin. Regs.,
    provides that closing agreements must be in writing and executed on forms
    prescribed by the IRS.
    Section 601.202(b), Statement of Procedural Rules, provides that
    “generally” the IRS will use one of two forms for closing agreements: Form 866,
    “Agreement as to Final Determination of Tax Liability”, or Form 906, “Closing
    Agreement on Final Determination Covering Specific Matters”. Form 866 is used
    to determine conclusively a taxpayer’s total tax liability for a taxable period.
    Id. Form 906
    is used if an agreement relates to one or more separate items affecting
    the tax liability of a taxpayer.
    Id. The content
    of the Forms 866 and 906 is different from the content of the
    Form 4549. There are four comparisons between Forms 866 and 906 versus Form
    4549 that illustrate the wording characteristic of a closing agreement. First, both
    Form 866 and Form 906 contain language indicating the documents embody
    agreements. The titles of both Forms 866 and 906 contain the word “agreement”,
    each document refers to itself as an “agreement”, and the parties’ signatures certify
    - 49 -
    [*49] that both the IRS and the taxpayer “agree” to the documents’ terms. By
    contrast, Form 4549 lacks the words “agree” or “agreement” altogether. Second,
    both Forms 866 and 906 state that the agreements are made pursuant to section
    7121, the section that governs agreements accorded finality. Form 4549 does not
    contain any mention of section 7121. Third, Forms 866 and 906 both state that
    “[t]his agreement is final and conclusive”. Form 4549 does not use the word
    “final” or “conclusive”. In fact, it makes no claim to finality at all. Fourth, above
    the parties’ signature lines on Forms 866 and 906, both forms provide that by
    signing them, the IRS and the taxpayer “have read and agreed to” the terms of the
    form. By contrast, nothing on the Form 4549 signed by the Goldbergs indicates
    the legal effect of RA Knighton’s signature. And Form 4549 purports to affect
    only the taxpayers, not the IRS. As compared to Forms 866 and 906, the Form
    4549 signed by the Goldbergs and RA Knighton bears none of the linguistic
    indicia that would purport to make it final or conclusive under section 7121.
    In conclusion, the Goldbergs’ execution of a Form 4549 did not
    permanently fix their interest liability at zero. Instead, by executing a Form 4549
    the Goldbergs consented to the immediate assessment and collection of the
    $46,865 deficiency and the interest imposed by law on that deficiency. The type
    of finality that Goldberg seeks for the interest for his 2004 tax year can be
    - 50 -
    [*50] obtained only under a closing agreement made pursuant to section 7121.
    The terms of the Form 4549 bear no resemblance to the terms of the two types of
    forms the IRS uses for closing agreements--the Form 866 and the Form 906.
    Though there was a “0.00” entered in line 19.c of the Form 4549 signed by the
    Goldbergs, the 0.00 did not permanently fix their underpayment interest at zero
    because they consented to the immediate assessment and collection of “additional
    interest as provided by law”.
    III.   Interest abatement
    Goldberg’s remaining argument is that the Office of Appeals erred by
    concluding he was not entitled to interest abatement for 22 periods.
    Section 6601(a) provides that interest accrues on any underpayment of tax.
    Section 6404(e)(1) provides that the IRS “may abate” an assessment of interest
    under certain conditions, which we discuss throughout this part, part III. For the
    22 periods for which Goldberg seeks abatement of interest, the parties have
    limited their arguments to whether section 6404(e)(1) provides grounds for relief.
    We thus limit our analysis of Goldberg’s remaining claims for interest abatement
    to section 6404(e)(1) and the regulations interpreting it. See Nicklaus v.
    Commissioner, 
    117 T.C. 117
    , 120 n.4 (2001).
    - 51 -
    [*51] We review Goldberg’s interest-abatement claims for abuse of discretion for
    reasons explained in part I. Thus, Goldberg must prove that the IRS’s denial of
    interest abatement was arbitrary, capricious, or lacked a “sound basis in fact or
    law.” Woodral v. Commissioner, 
    112 T.C. 23
    .
    We turn to section 6404(e)(1), which sets forth the conditions under which
    the IRS may abate interest. Section 6404(e)(1) provides that the IRS may abate an
    assessment of interest that is attributable to any unreasonable error or delay by an
    IRS officer or employee in performing a managerial or ministerial act. The error
    or delay is taken into account for purposes of section 6404(e)(1) only if “no
    significant aspect of such error or delay can be attributed to the taxpayer
    involved.”
    The Internal Revenue Code does not define “managerial” or “ministerial”
    acts, but the regulations do. Sec. 301.6404-2(b), Proced. & Admin. Regs. A
    managerial act is “an administrative act that occurs during the processing of a
    taxpayer’s case involving the temporary or permanent loss of records or the
    exercise of judgment or discretion relating to management of personnel.”
    Id. subpara. (1).
    General administrative decisions, “such as the IRS’s decision on
    how to organize” tax-return processing, are not managerial acts.
    Id. A ministerial
    act is “a procedural or mechanical act that does not involve the exercise of
    - 52 -
    [*52] judgment or discretion, and that occurs during the processing of a taxpayer’s
    case after all prerequisites to the act, such as conferences and review by
    supervisors, have taken place.”
    Id. subpara. (2).
    Decisions about the “proper
    application” of law are neither managerial nor ministerial acts.
    Id. para. (b).
    The
    regulations provide further guidance in examples,
    id. para. (c),
    which we discuss
    infra where relevant. Before turning to Goldberg’s entitlement to interest
    abatement for the 21 periods, we briefly address our method for ascertaining
    Goldberg’s arguments and positions.
    Though we would generally refer to a party’s briefs to determine its
    arguments, here we refer to the 2004 Abatement Schedule to determine Goldberg’s
    arguments for his entitlement to interest abatement for each of the 21 periods. At
    trial, IRS counsel stated it would “accept that those [periods in the 2004
    Abatement Schedule] are properly at issue in the case.” The IRS also wrote its
    briefs and structured its witness examinations to respond to the arguments in the
    2004 Abatement Schedule. Moreover, our review for abuse of discretion focuses
    on the reasoning and the conclusions drawn in the CDP hearing, which require an
    analysis of the arguments Goldberg made in the CDP hearing. See Magana v.
    Commissioner, 
    118 T.C. 493
    . The 2004 Abatement Schedule contained those
    arguments, and it is those arguments that we address in this opinion. Goldberg’s
    - 53 -
    [*53] briefs do not contain certain arguments found in the 2004 Abatement
    Schedule (although the briefs contain some ambiguous concessions that we
    discuss in the paragraph below). Therefore by focusing on Goldberg’s 2004
    Abatement Schedule, we are not ignoring arguments he raised in his briefs.
    In his simultaneous answering brief, Goldberg makes ambiguous
    concessions of some days in 7 of the 22 periods for which he had sought and been
    denied interest abatement. He stated his concessions as numbers of days in a
    period (as opposed to specific dates in a period) for which he no longer seeks
    interest abatement. We discuss Period 1 as an example of how Goldberg stated his
    concessions on brief. For Period 1, see infra pt. III.B, Goldberg sought nine days
    of interest abatement in the supplemental hearing (as he stated on the 2004
    Abatement Schedule). In its opening brief, the IRS requested the Court to find
    that it “did not commit any unreasonable error or delay in the performance of a
    ministerial or managerial act” during the nine days that make up Period 1.
    Goldberg answered that he “does not disagree for 8 days”, without specifying the
    dates of the eight days he concedes and the date of the ninth day he does not
    concede. Those attempted concessions do not assist us in resolving the case
    because they do not specify which dates are conceded and which dates are still at
    issue.
    - 54 -
    [*54] The specific dates matter because we look at each event occurring during
    each day for which Goldberg seeks interest abatement to determine whether there
    was an unreasonable error or delay in performing a managerial or ministerial act.
    See sec. 6404(e)(1). Goldberg’s failure to provide specific dates in a period does
    not allow us to determine which event Goldberg no longer challenges as involving
    errors, delays, managerial acts, or ministerial acts.
    We now discuss Goldberg’s entitlement to interest abatement for the 21
    periods specified by him in his 2004 Abatement Schedule. We also find it
    necessary to discuss events occurring in periods other than the 21 periods. Thus
    the remainder of this opinion contains two types of sections. The first type of
    section discusses events occurring during periods for which Goldberg has not
    sought and does not seek interest abatement, or for which the IRS has conceded he
    is entitled to interest abatement (Period 21). The second type of section discusses
    both events occurring within the periods and our conclusions as to whether
    Goldberg is entitled to interest abatement for each of those periods. The second
    type of section is subdivided into three parts: Introduction, Events, and Analysis
    and holding. There are 21 of the second type of section because we do not
    subdivide the conceded period (Period 21) into those three sub-sections. All
    sections are in chronological order.
    - 55 -
    [*55] A.    The Goldbergs’ 2004 income-tax return and the early stages of the
    examination of their 2004 income-tax return
    Goldberg does not seek interest abatement for this period. We discuss the
    events of this period because they provide context to the events for which
    Goldberg seeks interest abatement.
    The Goldbergs were the sole shareholders of five S corporations. The tax
    consequences of the Goldbergs’ ownership in two of these S corporations
    undergirded each of the three major issues in the examination of their 2004 joint
    income-tax return: the carryback and carryover of NOLs, the deductibility of
    S corporation losses, and the recognition of income from terminations and
    conversions of benefit plans in which the S corporations participated.
    On their 2004 joint income-tax return, the Goldbergs claimed a $985,367
    NOL carryover deduction from an NOL that arose in 2003. The record does not
    show how the NOL arose, though it appears that it was attributable to losses from
    one or both of the S corporations they owned.
    On their 2004 amended joint income-tax return, the Goldbergs claimed a
    carryback of NOLs arising in 2005, 2006, or both years. In the examination of
    their 2004 joint income-tax return, the IRS allowed the Goldbergs to carry back
    $2,290,009 of NOLs, and required them to recapture $415,334 of the 2003
    - 56 -
    [*56] carryover because of proposed adjustments to their 2005 tax liability. The
    losses giving rise to the NOLs appear to have passed through to the Goldbergs
    from one or more of their S corporations.
    One of the Goldbergs’ wholly owned S corporations was called Wireless
    Distributors, Inc. Wireless Distributors, Inc. had had losses every year since its
    inception. Every year, the Goldbergs deducted those losses in full on their
    personal income-tax returns, even though those losses exceeded the combined
    bases they held in the S corporation’s stock and debt. On their 2004 return, the
    amount of the Wireless Distributors Inc. loss that the Goldbergs deducted was
    $645,617, without regard to basis. In their 2004 examination, the IRS disallowed
    the deductions claimed in excess of the Goldbergs’ bases.
    The Goldbergs’ S corporations participated in two benefit plans that gave
    rise to income recognition events for the Goldbergs in 2004.16 Both plans were
    structured such that the participating S corporations each contributed money to a
    different trust that had been established by the respective plan’s administrator.
    These contributions were then used by each plan’s trustee to buy life insurance
    16
    Throughout the audit, the examining agent referred to the two plans as sec.
    419 or sec. 419A plans.
    - 57 -
    [*57] policies on the lives of Goldberg and his wife. Pursuant to these two plans,
    the Goldbergs were each insured by two policies, for a total of four policies.
    The first benefit plan was the Niche section 419A plan. One of the
    Goldbergs’ wholly owned S corporations participated in the plan, but the record
    does not show which S corporation it was. Niche was the name of the entity that
    sponsored or marketed the first plan. At some point in 2004, the Niche section
    419A plan in which the Goldbergs’ S corporation participated converted from a
    “multiple employer” plan to a “single employer” plan.17 In its examination of their
    2004 return, the IRS determined this conversion constituted a recognition event
    that gave rise to $394,091 of income that the Goldbergs had never reported.
    The second plan in which one of the Goldbergs’ S corporations participated
    was the Greater Metropolitan Benefits plan. RMG Enterprises, Ltd., was an
    S corporation wholly owned by the Goldbergs. RMG Enterprises, Ltd.,
    participated in the Greater Metropolitan Benefits plan. At some point, either the
    Goldbergs withdrew from the Greater Metropolitan Benefits plan or RMG
    Enterprises, Ltd., terminated its participation in the Greater Metropolitan Benefits
    plan. In its examination of their 2004 return, the IRS determined this withdrawal
    17
    Multiple employer plans have been marketed as providing tax benefits to
    participating employers. Notice 95-34, 1995-1 C.B. 309, 309-310.
    - 58 -
    [*58] or termination constituted a recognition event that gave rise to $601,328 of
    income that the Goldbergs had never reported.
    The IRS’s examination of the Goldbergs’ 2004 joint income-tax return
    began in June 2007.18 RA Knighton was assigned to the Goldbergs’ examination.
    The IRS selected the couple’s 2004 joint income-tax return for examination
    because the IRS had a national initiative to examine returns of taxpayers who, like
    the Goldbergs, had involvement with Niche section 419A plans. Though the
    Goldbergs’ return was selected for examination because of their involvement in
    the Niche section 419A plan, the examination was not limited to the Niche issue
    for tax year 2004.
    The examination focused on three areas: (1) the income arising from the
    Goldbergs’ involvement in the two benefit plans; (2) the Goldbergs’ carrybacks
    and carryovers of the NOL deductions; and (3) the deductibility to the Goldbergs
    of the losses of their wholly-owned S corporation, Wireless Distributors, Inc.
    The first 20 of the 22 periods for which Goldberg requested interest
    abatement were during the examination. The examination ended with the signing
    of the May 2011 Form 4549. Most of our findings of fact related to these first 20
    18
    The examinations of their 2003 and 2004 returns were performed
    simultaneously, but we focus on only the 2004 tax year.
    - 59 -
    [*59] periods are based on testimony given at trial and the activity log that RA
    Knighton (the examiner) used to contemporaneously document her actions during
    the examination of the Goldbergs’ 2004 income-tax return. Unless otherwise
    stated, we credit RA Knighton’s activity log and her testimony.
    On June 20, 2007, RA Knighton “opened [the] case file, prepared the
    electronic folder”, and mailed the first information document request (IDR) to the
    Goldbergs.19 We refer to this as the June 2007 IDR. Including that IDR, RA
    Knighton issued a total of four IDRs throughout this examination. None is in the
    record.20 We understand their substance by looking at RA Knighton’s activity log
    and the correspondence surrounding the issuance of each IDR. This
    correspondence includes the emails Goldberg and RA Knighton exchanged to
    clarify requests and confirm receipt of information and paper documents.
    Though not entirely clear, the record indicates that the June 2007 IDR asked
    for information pertaining to contributions that the S corporation had made to the
    Niche section 419A plan. Throughout June and early July 2007, Goldberg and RA
    19
    Throughout all periods we discuss, Goldberg generally acted as the
    couple’s liaison with RA Knighton; we have noted a few instances where the
    Goldbergs’ representative acted on the couple’s behalf.
    20
    The record also lacks documents such as cover letters (if any existed) that
    accompanied the IDRs.
    - 60 -
    [*60] Knighton exchanged phone calls, emails, and letters. In these June and July
    2007 communications, it seems that RA Knighton sought information from
    Goldberg about the Niche section 419A plans, the Goldbergs’ businesses, and
    their participation in other “retirement plans”.21
    On August 9, 2007, RA Knighton received some of the information she had
    requested from Goldberg in the June 2007 IDR. It is not clear when Goldberg
    responded to each of the requests in the June 2007 IDR; his responses were
    piecemeal.
    B.     Period 1: September 12-20, 2007
    1.     Introduction
    The Office of Appeals denied interest abatement for the nine days from
    September 12-20, 2007. On the 2004 Abatement Schedule, which was part of his
    submission to the Office of Appeals before the supplemental hearing, Goldberg
    argued that abatement should be granted because, he alleged, RA Knighton’s
    activity log “[i]ndicates she was locked out of” the e-wrap system for nine days.22
    21
    It was not until April 29, 2008, that RA Knighton learned of the
    Goldbergs’ involvement with the Greater Metropolitan Benefits plan. See infra pt.
    III.H.
    22
    In his simultaneous answering brief, Goldberg seemingly makes a
    concession, stating that “Petitioner does not disagree for 8 days” in response to the
    (continued...)
    - 61 -
    [*61] The e-wrap system is the electronic system that IRS employees working off
    site use to connect to the IRS’s computer system. The record does not show that
    RA Knighton was locked out for nine days, as explained below.
    2.     Events
    RA Knighton was locked out of the e-wrap system for one day, on
    September 17, 2007, not nine days as Goldberg alleges. Even though RA
    Knighton was locked out on September 17, 2007, her activity log--which
    Goldberg relied on to show his entitlement to interest abatement--shows that RA
    Knighton worked for four hours on the Goldbergs’ examination that day. It also
    states that though Goldberg did deliver some of the necessary documents that she
    had requested in the June 2007 IDR, he did not deliver them all. During this
    period, Period 1, RA Knighton noted in her activity log that she had found
    additional issues in the Goldbergs’ 2004 return and amended returns. These
    additional issues included the carryover and carryback of NOLs.
    22
    (...continued)
    IRS’s opening brief, which states that during the nine days of Period 1, the IRS
    “did not commit any unreasonable errors or delays in the performance of a
    managerial or ministerial act.” For the reasons we 
    explained supra
    part III, pp. 53-
    54, Goldberg’s attempt to concede a number of days without providing the
    specific dates does not narrow the issues to be decided.
    - 62 -
    [*62] For September 18 and 19, 2007, RA Knighton’s activity log does not have
    any entries for work on the Goldbergs’ 2004 examination. On September 20,
    2007, RA Knighton worked on the Goldbergs’ 2004 examination for three hours.
    In conclusion, we do not credit either Goldberg’s statement that RA
    Knighton was locked out of the e-wrap system for nine days or his implication that
    she did not perform any work on his case during Period 1. Instead, we find that
    RA Knighton was locked out of the e-wrap system for one day, on that day she
    performed four hours of work on the Goldbergs’ examination, and she performed a
    total of seven hours of work on their examination during this nine-day period.
    3.     Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period. Goldberg bears the burden of proving that RA Knighton made an
    unreasonable error or caused an unreasonable delay during this period. See Rule
    142(a). Goldberg has not met his burden; he has not proven the facts underlying
    his allegation that RA Knighton was locked out of the e-wrap system for nine days
    and was thus unable to work for nine days. Instead, RA Knighton’s activity log
    shows during this period she performed seven hours of work on the Goldbergs’
    examination. We do not see any error or delay, let alone an unreasonable error or
    delay. Consequently Goldberg has failed to show that the Office of Appeals
    - 63 -
    [*63] abused its discretion. See Foote v. Commissioner, T.C. Memo. 2015-187,
    at *17, aff’d, 700 F. App’x 760 (9th Cir. 2017).
    C.     Period 2: September 20-27, 2007
    1.    Introduction
    The Office of Appeals denied interest abatement for the eight days from
    September 20-27, 2007. Goldberg argued in the 2004 Abatement Schedule that
    interest abatement should be granted because allegedly RA Knighton “lacked
    knowledge of events or proceedures [sic]”, thus delaying the conclusion of the
    Goldbergs’ examination.23
    2.    Events
    As 
    stated supra
    part III.B (Period 1), RA Knighton worked on the
    Goldbergs’ 2004 examination for three hours on September 20, 2007. On that
    day, she spoke to Goldberg “at length” about various issues, including a
    developing issue about the Goldbergs’ claimed carryback NOL deductions. It
    23
    In his simultaneous answering brief, Goldberg seemingly makes a
    concession, stating that “Petitioner does not disagree for 7 days” in response to the
    IRS’s opening brief, which states that during the eight days of Period 2, the IRS
    “did not commit any unreasonable errors or delays in the performance of a
    managerial or ministerial act.” For the reasons we 
    explained supra
    part III, pp. 53-
    54, Goldberg’s attempt to concede a number of days without providing the
    specific dates does not narrow the issues to be decided.
    - 64 -
    [*64] seems that for at least one year, 2006 or 2005, or both, the Goldbergs had
    filed their income-tax returns as married-filing-separately, whereas for 2004, they
    filed jointly. It was not clear to RA Knighton that the Goldbergs could carry back
    an NOL arising in a year for which the Goldbergs had filed separately to years for
    which the two had filed jointly. RA Knighton indicated in her activity log for
    September 20, 2007, that she “need[ed] to research to determine of [sic] this
    [carryback] is acceptable.”
    Also on September 20, 2007, RA Knighton prepared and sent an additional
    IDR to the Goldbergs, giving them a two-week due date “with understanding that
    additional time may be needed”. We refer to this IDR as the September 2007 IDR.
    Though it is not exactly clear, the September 2007 IDR seems to have
    requested information still outstanding from the June 2007 IDR, including
    information about the Niche section 419A plan contributions. The September
    2007 IDR also sought information needed to determine the correctness of the
    Goldbergs’ reported NOL carrybacks and information about the Goldbergs’ bases
    in their stock and debt in their wholly-owned S corporations.24
    24
    Though the record is not entirely clear on the issue, it seems that Goldberg
    did not satisfy the September 2007 IDR’s requests for information about the
    Goldbergs’ bases in their S corporation stock and debt until December 8,
    2010--more than three years after RA Knighton had requested it.
    - 65 -
    [*65] There are no entries in RA Knighton’s activity log for September 21-26,
    2007. On September 27, 2007, RA Knighton received a fax from Goldberg with
    questions about the September 2007 IDR.
    Though it is literally true that RA Knighton “lacked knowledge of events”
    relevant to the proper treatment of the Goldbergs’ NOL carryback, she lacked this
    knowledge because it was a new development in the examination, and she had not
    yet received information about it from the Goldbergs. It is also literally true that
    RA Knighton “lacked knowledge of * * * [procedures]” for determining the
    proper treatment of the NOL carrybacks; however, RA Knighton lacked this
    knowledge in part because she did not yet have the underlying facts upon which to
    determine how to treat the NOLs. Because she did not yet have all the information
    and did not yet know the proper treatment of the NOLs, RA Knighton issued a
    second IDR (the September 2007 IDR), and she flagged for further research the
    issue (i.e., how an NOL can be carried back from separate returns filed for one
    year to a joint return filed for a different year). The September 2007 IDR sought
    information she had already requested in the June 2007 IDR and new information
    she needed to determine the proper carryback of an NOL. During this period, RA
    Knighton waited for Goldberg to provide information necessary for her to perform
    the examination.
    - 66 -
    [*66]         3.     Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period. Goldberg has failed to prove there was a managerial or ministerial act
    during this period. The record shows that RA Knighton decided she would need
    more information from the Goldbergs about their NOLs, and RA Knighton
    decided that she would need to research the proper method of carrying back the
    NOLs. Even if we assume these decisions unreasonably delayed the examination
    (which we do not), Goldberg’s arguments must fail because RA Knighton’s
    flagging an issue as needing additional information and research involved the
    exercise of discretion and regarded the proper application of Federal tax law.
    Thus, the hypothetical delay arising from her decisions did not occur in the
    performance of a managerial or ministerial act. See sec. 301.6404-2(b), Proced. &
    Admin. Regs.
    “It is well settled that a decision concerning the proper application of
    Federal income tax law necessarily requires the exercise of judgment and
    discretion” and is not a managerial or ministerial act. Foote v. Commissioner, at
    *20; see also sec. 301.6404-2(b), Proced. & Admin. Regs. Section 172 of the
    Internal Revenue Code is federal tax law. It provides a deduction for NOLs. Sec.
    172(a) and (b). RA Knighton made preliminary determinations about the types of
    - 67 -
    [*67] information she would need to determine the proper carryback of the
    Goldbergs’ NOL deductions. These preliminary determinations necessarily
    required RA Knighton to exercise her judgment as to what information she would
    need and involved decisions concerning the proper application of federal tax law.
    These determinations are neither ministerial nor managerial acts under section
    6404(e)(1). See sec. 301.6404-2(b), Proced. & Admin. Regs. Section 6404(e)(1)
    gives the IRS the discretion to abate interest only if there is a managerial or
    ministerial act. Here there was no managerial or ministerial act. It was not an
    abuse of discretion to deny Goldberg interest abatement for this period.
    D.     Intermediary period: September 28 through November 30, 2007
    Goldberg does not seek interest abatement for this period. We describe the
    events of this period to provide a complete background. RA Knighton spoke with
    Goldberg on October 10, 2007, about obtaining additional information relating to
    his 2004 joint income-tax return. It is not clear what they discussed, except that
    RA Knighton explained to Goldberg that she would prefer that he send her
    information in bulk as opposed to piecemeal.
    - 68 -
    [*68] E.    Period 3: December 1, 2007, through January 31, 2008
    1.     Introduction
    The Office of Appeals denied interest abatement for the 62 days from
    December 1, 2007, through January 31, 2008. In the 2004 Abatement Schedule,
    Goldberg argued that interest abatement should be granted because allegedly the
    “RA’s activity records show[] no activity” on his 2004 examination during this
    period.25
    2.     Events
    In December 2007, RA Knighton made an entry in her activity log that she
    had received three separate packages from Goldberg with cover letters dated
    respectively November 30, December 11, and December 14, 2007. Her activity
    log does not have any other entries for December 2007, nor does the record
    contain additional information about her activity for the month. The packages
    from Goldberg contained some of the information RA Knighton had requested in
    25
    In his simultaneous answering brief, Goldberg seemingly makes a
    concession, stating that “Petitioner does not disagree for 60 days” in response to
    the IRS’s opening brief, which states that during the 62 days of Period 3 the IRS
    “did not commit any unreasonable errors or delays in the performance of a
    managerial or ministerial act.” For the reasons we 
    explained supra
    part III, pp. 53-
    54, Goldberg’s attempt to concede a number of days without providing the
    specific dates does not narrow the issues to be decided.
    - 69 -
    [*69] the September 2007 IDR. The response to the September 2007 IDR had
    been due in early October 2007.26
    In the new year, 2008, there is no documented work on the Goldbergs’ 2004
    examination until January 31, 2008. On January 31, 2008, RA Knighton received
    a phone call from Offer-and-Compromise Appeals Officer Karin Banks. This
    phone call is discussed in more detail in Period 4, infra part III.F.
    Though RA Knighton’s activity log reflects little work on the Goldbergs’
    2004 examination during December 2007, RA Knighton credibly testified that her
    activity log does not reflect her work on the examinations of other taxpayers for
    this period. RA Knighton was working on examinations other than the Goldbergs’
    2004 and 2003 examinations. She maintained a separate activity log for each year
    for each taxpayer whose returns she examined, and she did not always note in her
    activity log for one examination that she was working on another examination.
    Even though her activity log for the Goldbergs’ 2004 examination sometimes
    explicitly noted when she was not able to work on the Goldbergs’ 2004
    examination during other periods (writing, for example, “Delay in case due to RA
    26
    It seems that RA Knighton subsequently determined that those three
    packages were insufficient to support the NOL carryback. It seems that RA
    Knighton determined that Goldberg did not provide sufficient information to
    support the NOL carryback until three years later on December 8, 2010.
    - 70 -
    [*70] working older priority cases”), she did not make such a notation for
    December 2007 or January 2008.
    In conclusion, we find that during Period 3 RA Knighton documented
    receiving three packages from Goldberg and spending one hour on a phone call.
    Goldberg sent these three packages in response the September 2007 IDR, a
    response that was more than a month and a half overdue. RA Knighton also
    worked on other cases during this period, work which she did not document in her
    activity log for the Goldbergs’ 2004 examination.
    3.     Analysis and holding
    We sustain the Office of Appeals’ denial of interest abatement for this
    period because Goldberg has failed to allege or prove that any delay during this
    period occurred in the performance of a managerial or ministerial act. During this
    period, RA Knighton had decided to work on examinations other than the
    Goldbergs’ 2004 joint income-tax return examination. A revenue agent’s
    “decision of how and when to work on a case, based on an evaluation of * * *
    [her] entire caseload and * * * [her] workload priorities, is not a ministerial act.”
    Jean v. Commissioner, T.C. Memo. 2002-256, slip op. at 11; see also sec.
    301.6404-2(b)(2), Proced. & Admin. Regs. (stating decisions involving “the
    exercise of judgment or discretion” are not ministerial acts). Nor is such a
    - 71 -
    [*71] decision a managerial act. It “is more akin to a general administrative
    decision”, for which interest cannot be abated under section 6404(e)(1).
    Hornbacker v. Commissioner, T.C. Memo. 2016-65, at *19; see also sec.
    301.6404-2(c), Examples (7) and (8), Proced. & Admin. Regs. Because RA
    Knighton’s decisions about how and when to work on the Goldbergs’ examination
    are neither managerial nor ministerial acts under section 6404(e)(1), abatement of
    interest was not allowable. The Office of Appeals’ determination not to abate
    interest for this period, Period 3, was not an abuse of discretion.
    F.     Period 4: January 31 through March 11, 2008
    1.     Introduction
    The Office of Appeals denied interest abatement for the 41 days27 from
    January 31 through March 11, 2008. In the 2004 Abatement Schedule, Goldberg
    argued that abatement should be granted because the “RA’s activity record shows
    she was delayed” for the entire 41-day period “due to working on higher priority
    cases”.
    27
    On the 2004 Abatement Schedule, Goldberg requested interest abatement
    for “39” days. The Office of Appeals correctly assumed Goldberg was requesting
    41 days of interest abatement on the basis of the start and end dates he provided
    for Period 4.
    - 72 -
    [*72]            2.    Events
    On January 31, 2008, the first day of this period, RA Knighton documented
    speaking with Banks. As we noted in Period 
    3, supra
    part III.E, p. 69, Banks had
    called RA Knighton. The two spoke about the Goldbergs’ examination for one
    hour. Banks explained to RA Knighton that Goldberg had made an offer-in-
    compromise for multiple tax years, including 2004. This offer was pending at the
    time Banks spoke with RA Knighton. Banks said that once an offer is made for a
    specific tax year, the IRS is not “supposed to make any other assessments [of tax]
    for that year.” The examination of the Goldbergs’ 2004 tax year could yield
    deficiencies and additions to tax, which would in turn lead to assessments of tax.
    If the IRS accepted Goldberg’s pending offer-in-compromise while the 2004
    examination was still taking place, the IRS would be precluded from later
    assessing any deficiencies determined from the examination.28 Banks thus
    concluded that Goldberg’s offer for the 2004 tax year was premature because the
    Goldbergs’ 2004 tax liability was still undetermined at the time Goldberg made
    the offer.
    28
    According to Banks.
    - 73 -
    [*73] During February 2008, RA Knighton did not perform any work on the
    examination of the Goldbergs’ 2004 return because she was busy “working [on]
    older priority cases” of other taxpayers or other tax years of the Goldbergs.
    The record does not reflect any activity on the examination of any of the
    Goldbergs’ returns on March 1-10, 2008. March 11, 2008, is discussed in the next
    period, Period 5, infra part III.G.
    We find that for most of Period 4, RA Knighton was indeed delayed
    working on the Goldbergs’ 2004 examination because she was working on other
    cases, though she did perform some work on the Goldbergs’ 2004 examination on
    January 31, 2008.
    3.     Analysis and holding
    We sustain the Office of Appeals’ denial of interest abatement for this
    period. Goldberg has neither identified nor proven that any delay during this
    period occurred in the performance of a managerial or ministerial act. “The
    prioritizing of work and caseloads is not a managerial or ministerial act.”
    Hornbacker v. Commissioner, at *19; see also sec. 301.6404-2(c), Examples (7)
    and (8), Proced. & Admin. Regs. During this period, Period 4, RA Knighton
    prioritized working on “older priority cases” instead of working on the Goldbergs’
    2004 joint income-tax return. Her decision to prioritize is not a ministerial or
    - 74 -
    [*74] managerial act. The Office of Appeals’ denial of interest abatement for
    Period 4 was not an abuse of discretion.
    G.    Period 5: March 11 through April 28, 2008
    1.     Introduction
    The Office of Appeals denied interest abatement for the 49 days29 from
    March 11 through April 28, 2008. In the 2004 Abatement Schedule, Goldberg
    argued that abatement should be granted because RA Knighton’s activity log
    shows that she performed no work during this period on the Goldbergs’ 2004
    examination or on the Goldbergs’ returns for other years, or on any other
    taxpayers’ returns. This argument reflects Goldberg’s misunderstanding of how
    RA Knighton documented her activities.
    2.     Events
    On the first and second days of this period, March 11 and 12, 2008,
    Goldberg and RA Knighton exchanged voice mails and emails. It appears that
    Goldberg told RA Knighton that he needed her to speed up the examination
    because he believed the conclusion of his 2004 examination would result in a
    29
    On the 2004 Abatement Schedule, Goldberg requested interest abatement
    for “39” days. The Office of Appeals correctly assumed Goldberg was requesting
    49 days of interest abatement on the basis of the start and end dates he provided
    for Period 5.
    - 75 -
    [*75] refund that he believed he could use to reduce interest from accruing on his
    unpaid tax liabilities from 1994. This refund, it seems, was claimed on a Form
    1040X, “Amended U.S. Individual Income Tax Return”, that the Goldbergs had
    filed for their 2004 tax year. The record is unclear on the issue, but it appears that
    Goldberg believed that he was entitled to a 2004 refund because of the carryback
    of NOLs to 2004. RA Knighton told Goldberg that she was unable to “release”
    the money to Goldberg unless he planned to settle the entire examination of his
    2004 joint income-tax return.
    RA Knighton did not document any activity on Goldberg’s 2004 joint
    income-tax return on March 13-24, 2008.
    On March 25, 2008, Goldberg asked for an update on RA Knighton’s
    progress on the examination. RA Knighton does not seem to have responded to
    Goldberg’s request for an update, but she recorded in her activity log that she did
    not have control over his refund. Her notes do not explain why she lacked control
    over his refund, but we gather from other parts of the record that she thought she
    could not comply with Goldberg’s request because the Form 1040X was for the
    year that she was examining, 2004, and she could not release any claimed refunds
    for that year until the entire examination was completed.
    - 76 -
    [*76] As the examination progressed, RA Knighton realized that the Goldbergs’
    involvement in the benefit plans was complex, and she sought assistance from the
    IRS’s Issue Management Team (“IMT”). RA Knighton explained at trial that the
    IMT is a “group of people who are knowledgeable” about a specific issue. On the
    same day that Goldberg emailed her about his refund, March 25, 2008, RA
    Knighton contacted the IMT and scheduled a meeting with IMT member John
    Marien for the end of April 2008.
    RA Knighton did not document any activity on the Goldbergs’ 2004 joint
    income-tax return on March 26-31 or April 1-26, 2008.
    On April 27, 2008, RA Knighton responded to another email from Goldberg
    about releasing the refund he had claimed on the Form 1040X. She told Goldberg
    that she had a three-day work session with an IMT member scheduled for April 29
    through May 1, 2008.
    On April 28, 2008, RA Knighton organized her case file in preparation for
    her three-day session with IMT member Marien.
    During this entire period, as with prior periods, RA Knighton had been
    working on other cases for different taxpayers, different years of the Goldbergs,
    and even different years for the Goldbergs’ S corporations. As with Period 3, she
    - 77 -
    [*77] did not document her activity for other taxpayers, years, or entities in her
    activity log that she kept for the Goldbergs’ 2004 examination.
    In conclusion, we find that RA Knighton was actively working on the
    Goldbergs’ 2004 examination during this period, Period 5, and that she was
    working on examinations for other years, taxpayers, and entities.
    3.    Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period because Goldberg has failed to prove an unreasonable error or delay in
    performing a managerial or ministerial act. Instead of an error or delay, the record
    shows that RA Knighton worked diligently on the Goldbergs’ examination during
    this period. See Foote v. Commissioner, at *27. RA Knighton also chose to work
    on other examinations during this period. And even assuming this choice
    somehow delayed the Goldbergs’ examination, RA Knighton’s decision involved
    the exercise of discretion, which is not a ministerial act. See Jean v.
    Commissioner, slip op. at 11; see also sec. 301.6404-2(b)(2), Proced. & Admin.
    Regs. Goldberg has not put forth any evidence that this choice constituted a
    managerial act, either. Cf. sec. 301.6404-2(b)(1), Proced. & Admin. Regs.
    (defining “managerial act” as an administrative act “involving * * * the exercise of
    judgment or discretion relating to management of personnel”). Because there was
    - 78 -
    [*78] no unreasonable error or delay in performing a managerial or ministerial act,
    it was not an abuse of discretion for the Office of Appeals to deny interest
    abatement for Period 5.
    H.     Intermediary period: April 29 through July 17, 2008
    Goldberg does not seek interest abatement for this period. We describe the
    events of this period to provide a complete background.
    From April 29 through May 1, 2008, RA Knighton and Marien worked a
    total of 12 hours on the Goldbergs’ 2004 income-tax return, focusing on the
    Goldbergs’ involvement in two benefit plans. On April 29, 2008, RA Knighton
    documented that either she or Marien had determined that the Goldbergs (through
    one of their S corporations) were involved in the Greater Metropolitan Benefits
    plan. It seems that before this April 29, 2008 notation RA Knighton had believed
    that the Goldbergs were involved in only the Niche section 419A plan.
    On May 2, 2008, RA Knighton worked for two hours on the issue of if (and
    how) the NOLs that arose in a year when the Goldbergs filed separately could be
    carried back to 2004, a year for which the couple filed jointly.
    From May 5-7, 2008, RA Knighton worked for seven hours on the
    Goldbergs’ 2004 joint income-tax return. On May 6, 2008, she made two requests
    for information from Goldberg. The first request was in the form of a third IDR
    - 79 -
    [*79] (the May 2008 IDR), which appears to have sought information she had not
    yet asked for in any IDR. It seems (though is not clear) that this first May 6, 2008
    request, the May 2008 IDR, sought information about the Goldbergs’ involvement
    with the Greater Metropolitan Benefits plan. The second request was informally
    made via email and appears to have sought S corporation basis information that
    she had previously requested in the September 2007 IDR. In the email, RA
    Knighton requested that Goldberg provide her certain years’ Forms 1120S, “U.S.
    Income Tax Return for an S Corporation”, for two of the Goldbergs’ wholly
    owned S corporations: RMG Enterprises, Ltd., and Wireless Distributors, Inc.
    RA Knighton explained that her requests were preliminary and that she would
    have “specific questions for * * * [Goldberg]” after she received this
    information.30 She also let him know that he should expect to receive the May
    2008 IDR in the mail.
    Six days later on May 12, 2008, Goldberg emailed RA Knighton to confirm
    that he had received the May 2008 IDR, which sought information about the
    30
    It is not clear when Goldberg fulfilled these requests for the Forms 1120S.
    They may have been fulfilled on May 30, 2008; August 16, 2008; or September 4,
    2008. The requests for this preliminary information in the form of Forms 1120S
    seems to have been fulfilled by September 4, 2008, because on that day, RA
    Knighton determined that she needed to open examinations for the Goldbergs’
    subsequent tax years to determine the propriety of the NOL carrybacks.
    - 80 -
    [*80] Greater Metropolitan Benefits plan. He said he would do his best to obtain
    the information, even though the “request is overwhelming”. Two days later, he
    emailed her again, echoing the May 12, 2008 email.
    On May 19, 2008, RA Knighton received an email inquiry from Goldberg.
    His email seemed to ask questions about the IRS’s objection to the Niche section
    419A and Greater Metropolitan Benefits plans. She sought Marien’s assistance in
    responding to the email. The two composed a response, and RA Knighton sent it
    to Goldberg. She documented one hour of work on the email inquiry. Goldberg
    responded the following day, May 20, 2008, confirming receipt of the email.
    A few days later, on May 23, 2008, RA Knighton received an email from
    Goldberg listing the information he would send in response to the May 2008 IDR.
    In that email, he asked her a question about whether a particular precedent applied
    to his examination; RA Knighton forwarded the question to the IMT.
    On May 27, 2008, RA Knighton received an email from Goldberg’s Niche
    section 419A plan sponsor, Judi Carsrud.
    On May 30, 2008, RA Knighton received documents from Goldberg that
    satisfied at least four of the requests in the May 2008 IDR. These four requests
    - 81 -
    [*81] related to the contributions the S corporations had made to either of the two
    benefit plans.31
    In June 2008, RA Knighton documented receiving two emails (on June 2
    and 5) from Goldberg about satisfying IDRs. Aside from logging the receipt of
    the two emails, it does not appear that RA Knighton performed other work on
    Goldberg’s 2004 return in June 2008.
    During the period July 1-17, 2008, it does not appear that RA Knighton
    worked on Goldberg’s 2004 joint income-tax return.
    I.     Period 6: July 18-30, 2008
    1.    Introduction
    The Office of Appeals denied interest abatement for the 13 days from July
    18-30, 2008. In the 2004 Abatement Schedule, Goldberg argued that interest
    should be abated because the “RA’s activity records show[] that she had to work
    with IMT specialist as she was unable to understand” the components of the
    Goldbergs’ examination, and thus “no work [was] done” on the 2004 examination,
    delaying its conclusion.
    31
    The remaining requests in the May 2008 IDR were satisfied partially, if
    not fully, on August 16, 2008, over three months later.
    - 82 -
    [*82]         2.    Events
    On July 18, 2008, RA Knighton reviewed the information Goldberg
    provided in partial satisfaction of the May 2008 IDR. On that same day, RA
    Knighton asked Marien for help with the Niche section 419A plan issue, and they
    scheduled a meeting for July 30, 2008. The two met on July 30, 2008, and worked
    for two hours on Goldberg’s 2004 joint income-tax return. They focused on how
    the various insurance policies funded the plans.
    Also during this time RA Knighton was still waiting for Goldberg to fully
    respond to the May 2008 IDR, which sought information about the Greater
    Metropolitan Benefits plan.
    We conclude that RA Knighton sought help from Marien, and RA Knighton
    did perform work during this period.
    3.    Analysis and holding
    We sustain the Office of Appeals’ denial of interest abatement for this
    period because Goldberg failed to identify any unreasonable delay that occurred
    during this period occurred in the performance of a managerial or ministerial act.
    Even assuming that RA Knighton’s need to seek advice was unreasonably dilatory
    (an assumption that is not borne out by the record), the delay did not occur in the
    performance of a managerial or ministerial act because a decision to “request
    - 83 -
    [*83] advice is a decision concerning the proper application of federal tax law”,
    meaning it is “neither a ministerial nor managerial act.” Sec. 301.6404-2(c),
    Example (9), Proced. & Admin. Regs. RA Knighton’s decision to seek assistance
    from Marien about the proper treatment of the Niche section 419A plan was a
    decision to request advice about federal tax law. As such, it was neither a
    managerial nor ministerial act.
    Because Goldberg did not prove there was a managerial or ministerial act,
    either of which is a predicate act for the IRS’s abatement of interest, sec.
    6404(e)(1), we find it was not an abuse of discretion for the Office of Appeals to
    deny interest abatement for Period 6.
    J.       Intermediary period: July 31 through August 7, 2008
    Goldberg does not seek interest abatement for this period. We describe the
    events of this period to provide a complete background.
    On August 1, 2008, RA Knighton worked with Marien to prepare another
    IDR (the August 2008 IDR), which RA Knighton sent to Goldberg.32 The August
    2008 IDR seems to have pertained to the Niche section 419A plan and the Greater
    Metropolitan Benefits plan. RA Knighton wrote that Marien “may want to use
    32
    It is not clear when (if ever) the August 2008 IDR was satisfied.
    - 84 -
    [*84] * * * [the Goldbergs’] case as a basis for his inquiries” into the examinations
    of other taxpayers who had been involved with Niche section 419A plans.
    A few days later, on August 4, 2008, RA Knighton received an email from
    Goldberg that indicated he had received a refund on his 2004 return despite her
    examination of the return not yet having been completed. The email also indicated
    he would “give * * * [the August 2008 IDR his] prompt attention when it is
    received.” The email suggests therefore that on August 4, 2008, Goldberg had not
    yet received the August 2008 IDR.
    K.     Period 7: August 8-16, 2008
    1.    Introduction
    The Office of Appeals denied interest abatement for the nine days from
    August 8-16, 2008. Goldberg argued that interest abatement should be granted for
    this period because RA Knighton’s case activity record shows that another IRS
    employee “was too busy to work with” RA Knighton, allegedly delaying the
    - 85 -
    [*85] completion of the examination.33 Goldberg did not name this employee, but
    it is apparent that he was referring to Marien.
    2.    Events
    On August 8, 2008, RA Knighton received an email from Goldberg that
    confirmed he had received the August 2008 IDR. On August 12, 2008, RA
    Knighton received an email from Goldberg informing her that he had sent her a
    certified letter.
    On August 16, 2008--the last day in this period--RA Knighton received the
    certified letter referred to in the August 12, 2008 email. The certified letter was
    accompanied by what appears to be the remaining information needed to complete
    Goldberg’s response to the May 2008 IDR. We note that this information was
    received more than three months after it was requested. The information pertained
    to the Greater Metropolitan Benefits plan. Upon receiving the certified letter, RA
    Knighton called Marien to “schedule a date for review.” Marien said he was
    unable to participate because he was leaving the IRS for private practice.
    33
    In his simultaneous answering brief, Goldberg seemingly makes a
    concession, stating that “Petitioner does not disagree [sic] [for] 8 days” in
    response to the IRS’s opening brief that during the nine days of Period 7, the IRS
    “did not commit any unreasonable errors or delays in the performance of a
    managerial or ministerial act.” For the reasons we 
    explained supra
    part III, pp. 53-
    54, Goldberg’s attempt to concede a number of days without providing the
    specific dates does not narrow the issues to be decided.
    - 86 -
    [*86] The record does not show that RA Knighton performed work on the
    Goldbergs’ 2004 examination on August 9, 10, 11, 13, 14, or 15.
    We find that during Period 7 (August 8-16, 2008), RA Knighton was
    waiting for Goldberg to deliver the information requested in the May 2008 IDR.34
    The documents requested in the May 2008 request had been provided on August
    16, 2008, the last day of this period. It appears that these documents, as well as
    others that had been requested in the September 2007 IDR, were necessary for RA
    Knighton to proceed with the examination. The delay that Goldberg alleges
    occurred during this period was attributable to Goldberg’s failure to provide these
    documents. The delay in completing the examination was not attributable to
    Marien’s lack of time to meet with RA Knighton.
    3.     Analysis and holding
    We uphold the IRS’s denial of interest abatement for this period because
    Goldberg caused a significant aspect of the delay he alleged. Interest may not be
    abated if a “significant aspect of such error or delay can be attributed to the
    taxpayer involved”. Sec. 6404(e)(1). In Foote v. Commissioner, at *25, we found
    the taxpayer responsible for significant aspects of the delay where he failed to
    34
    RA Knighton may also have been waiting for information requested in the
    August 2008 IDR, but the record is not clear.
    - 87 -
    [*87] timely submit all requested documents that the examining agent needed to
    proceed with the examination. See also Braun v. Commissioner, T.C. Memo.
    2005-221, slip op. at 13-14 (finding various actions by taxpayer constituted
    significant aspect of error or delay, including failure to submit all requested
    information necessary to move forward with examination); Cosgriff v.
    Commissioner, T.C. Memo. 2000-241, slip op. at 8 (finding taxpayer’s
    cancellation of “scheduled appointments” and “failure to timely produce requested
    information” that caused errors or delays were attributable to taxpayer).
    Like the taxpayer in Foote, Goldberg has alleged that an IRS employee (RA
    Knighton) delayed his examination for a period in which he had not provided her
    with the information necessary for her to perform the examination. She was
    waiting for information she had requested in the May 2008 IDR.35 He did not
    provide this information until the last day of this period. We find Goldberg’s
    failure to timely provide this information significantly (if not fully) caused any
    delay during this period. See sec. 6404(e)(1). We thus hold that the IRS did not
    abuse its discretion in denying interest abatement during this period.
    35
    RA Knighton may have also been waiting for information she had
    requested in the September 2007 IDR. Goldberg did not deliver all that
    information until December 2010.
    - 88 -
    [*88] L.    Intermediary period: August 17-26, 2008
    Goldberg does not seek interest abatement for this period. We describe the
    events of this period to provide a complete background.
    The record lacks any information about RA Knighton’s work on
    Goldberg’s 2004 joint income-tax return during this 10-day period.
    M.    Period 8: August 27 through September 4, 2008
    1.     Introduction
    The Office of Appeals denied interest abatement for the nine days from
    August 27 through September 4, 2008. In the 2004 Abatement Schedule,
    Goldberg argued that interest abatement should be granted for this period because
    RA Knighton’s “activity record shows that she only worked on this file for less
    than 1 hour”. This argument reflects Goldberg’s misunderstanding of how RA
    Knighton documented her time. RA Knighton testified that her activity log
    showed she in fact worked 14 hours on his examination during this period.
    2.     Events
    During the nine-day span of August 27 through September 4, 2008, RA
    Knighton documented working 14 hours on the Goldbergs’ 2004 joint income-tax
    return and spending additional time examining their returns for other years. In her
    - 89 -
    [*89] activity log, RA Knighton wrote that she documented the other examinations
    in separate activity records, which are not part of the record.
    Goldberg’s allegation that RA Knighton worked less than an hour during
    this period likely arises from his confusion about the way RA Knighton records
    her time. The following image is an excerpt from RA Knighton’s activity log
    during this period, Period 8.
    At trial, RA Knighton explained that the numbers Goldberg assumed to be
    fractions of an hour in the column labeled “Time on 2004” show the number of
    hours she worked on the case for the day (the number to the left of the forward
    slash) and the cumulative hours that she had worked on the case to date (the
    number to the right of the forward slash). For example, on August 27, 2008, RA
    Knighton worked 2 hours; and including those 2 hours, her cumulative time on
    Goldberg’s 2004 joint income-tax return was 38 hours. On August 28, 2008, she
    - 90 -
    [*90] worked 4 hours; and including those 4 hours, her cumulative time on the
    Goldbergs’ 2004 joint income-tax return was 42 hours. The same pattern
    continues for the remaining days. RA Knighton documented her time in the same
    way for all periods that we discuss.
    Goldberg’s contention that RA Knighton worked less than one hour during
    the nine-day span seems to arise from the view that the use of slashes connotes
    fractions of an hour. If the entries for the nine-day span are interpreted as
    fractions in the “Time on 2004” column, with hours as their unit, then their sum is
    0.32 hours, which is less than one hour. However, we find that Goldberg’s
    interpretation was incorrect, and that RA Knighton worked a total of 14 hours
    during this nine-day period.
    3.     Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period. Goldberg has failed to identify or prove an error or delay or a managerial
    or ministerial act. See sec. 6404(e)(1); see also Foote v. Commissioner, at *23
    (denying interest abatement where taxpayers failed to identify predicate act). To
    the contrary, the record shows that RA Knighton worked steadily on Goldberg’s
    2004 examination during this period.
    - 91 -
    [*91] Absent an error or delay and a managerial act or a ministerial act, no interest
    abatement is available under section 6404(e)(1). We hold that the IRS did not
    abuse its discretion in denying interest abatement because Goldberg failed to
    prove the predicate conditions under which it may be abated. See Banat v.
    Commissioner, T.C. Memo. 2000-141, slip op. at 6 (“[T]he Secretary has no
    authority to abate an assessment of interest on a deficiency unless that assessment
    is attributable in whole or in part to some error or delay by an officer or employee
    * * * of the Service in performing a ministerial act.”), aff’d, 5 F. App’x 36 (2d Cir.
    2001).
    N.     Period 9: September 4-22, 2008
    1.    Introduction
    The Office of Appeals denied interest abatement for the 19 days from
    September 4-22, 2008. In the 2004 Abatement Schedule, Goldberg argued that
    abatement should be granted for this period because RA Knighton’s activity
    record shows that at that point in his examination, she “was working on something
    other than the examination of” the Goldbergs’ S corporation’s section “419 plan”.
    The section 419 plan could refer to either the Niche section 419A plan or the
    Greater Metropolitan Benefits plan because both were regulated by the provisions
    of section 419, and RA Knighton’s activity log seems to have referred to them
    - 92 -
    [*92] both as section 419 plans. We take Goldberg’s argument to be that it was
    erroneous or dilatory for RA Knighton to work on anything other than the
    treatment of the Niche plan, the Greater Metropolitan Benefits plan, or both at this
    point in his examination.
    2.    Events
    During Period 9, RA Knighton’s activity log shows that she was working on
    various issues in the examination of the Goldbergs’ 2004 joint income-tax return,
    including the appropriateness of the claimed carryback and carryover of NOLs.
    To correctly determine these carrybacks and carryovers, RA Knighton wrote in her
    activity log that she needed to open up examinations for years after tax year 2004.
    It also appears that she needed to examine the Form 1120S, “U.S. Income Tax
    Return for an S Corporation”, that was filed by one of the S corporations of which
    the Goldbergs were 100% shareholders. RA Knighton wrote in her activity log for
    the Goldbergs’ 2004 examination that she documented her examination for the
    additional years and entity on separate activity records. These records were not
    offered into evidence, though we have no reason to doubt that they existed and
    that RA Knighton documented her time in them.
    On September 4, 2008, RA Knighton noted that the expiration of the period
    of limitations was quickly approaching and she had yet to complete her
    - 93 -
    [*93] examination report or receive a Form 872-I, “Consent to Extend the Time to
    Assess Tax as Well as Tax Attributable to Items of a Partnership”, from the
    Goldbergs.36 At some time before the period we are discussing, Period 9, RA
    Knighton had sent the Goldbergs a Form 872-I to extend the period of limitations
    for assessment to June 30, 2009.
    RA Knighton also documented speaking on the phone with Goldberg and
    receiving emails from him during this period. On September 19, 2009, RA
    Knighton called Goldberg and told him that because the period of limitations for
    assessment was imminently expiring and the Goldbergs had not yet signed Forms
    872-I to consent to extend the period of limitations, she would be closing the case
    36
    In general, the IRS may not assess tax more than three years from the date
    the return is due (if the return was filed on or before that date) or the date the
    return was filed (if the return was filed late). Sec. 6501(a) and (b)(1). The general
    three-year period can be extended when the IRS and the taxpayer consent in
    writing to extension. Sec. 6501(c)(4). This consent is often made in some version
    of the Form 872. See sec. 601.105(f), Statement of Procedural Rules; see also
    Internal Revenue Manual (“IRM”) pt. 8.21.3.1.3.5 (Aug. 14, 2007).
    IRS Form 872-I, “Consent to Extend the Time to Assess Tax as Well as Tax
    Attributable to Items of a Partnership”, allows for the extension of the period for
    assessment of tax with respect to both partnership items and nonpartnership items.
    Form 872-I (February 2005); see also IRM pt. 4.31.2.6.3(3)(b.) (Mar. 4, 2008).
    RA Knighton may have used a Form 872-I because the Goldbergs reported they
    owned partnership interests and reported related partnership items on their 2004
    Schedule E, “Supplemental Income and Loss”. The IRM directed agents to use a
    Form 872-I if “the examiner is uncertain as to the TEFRA status of any partnership
    in which the taxpayer has invested”. IRM pt. 25.6.22.4.3(1) (Mar. 1, 2008).
    - 94 -
    [*94] on the basis of the information she presently had in the case file. She seems
    to have told him this would affect the amount or possibility of carrying the NOLs
    forward and backward. Three days later, on September 22, 2008, Goldberg sent
    RA Knighton an email asking her to respond in writing to the various queries he
    had earlier put to her, some of which seemed to have been about the applicability
    of certain caselaw to his examination.37 RA Knighton did not immediately
    respond to the email. She forwarded the email to her group manager and
    discussed the case with her group manager in the following period, Period 10, on
    September 23, 2009.
    Goldberg’s allegation that RA Knighton was working on something other
    than the examination of the section 419 plans is an accurate statement of RA
    Knighton’s activities. However, the inference he intends for us to draw from the
    statement--that this work created an error or delay--is unsupported. To the
    contrary, RA Knighton appears to have spent considerable time on the Goldbergs’
    2004 joint income-tax return, including determining the availability of “NOL carry
    back[s]”. It appears that RA Knighton chose to organize her work during this
    period to focus on issues other than section 419 plan issues. It is not clear why she
    37
    Goldberg sent one of these inquiries in a certified letter. The letter is not
    in the record. Goldberg sent this letter in response to the August 2008 IDR.
    - 95 -
    [*95] made this choice. The record reveals two likely reason: one, Goldberg had
    not yet fulfilled the August 2008 IDR, which RA Knighton needed to make
    determinations on the Niche plan, or two, the section 419 issue may have (in the
    words of RA Knighton) “gone National”, meaning RA Knighton lacked control
    over its resolution. Regardless of her reasoning, RA Knighton made a choice to
    organize her workload to focus on issues other than the section 419 issue.
    3.    Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period because Goldberg has not shown that it was an error for RA Knighton to
    work on issues other than the section 419 plan issue. The record shows that RA
    Knighton worked diligently on other issues of the Goldbergs’ 2004 examination.
    Absent an unreasonable error or delay, the Office of Appeals lacks the discretion
    to abate interest under section 6404(e)(1).
    Furthermore, Goldberg has failed to show that RA Knighton’s decision to
    work on issues other than the section 419 issue is a managerial or ministerial act.
    We have already 
    explained, supra
    parts III.E and III.G (Periods 3 and 5,
    respectively), that such decisions about how and when to work on a case are
    neither managerial nor ministerial acts. See Jean v. Commissioner, slip op. at 11;
    Hornbacker v. Commissioner, at *19; see also sec. 301.6404-2(b)(2), (c),
    - 96 -
    [*96] Examples (7) and (8), Proced. & Admin. Regs. The record does not show an
    error or delay or a managerial or ministerial act. Thus it was not an abuse of
    discretion for the IRS to decline to abate interest under section 6404(e)(1).
    O.     Period 10: September 23-25, 2008
    1.    Introduction
    The IRS denied interest abatement for the three days from September 23-25,
    2008. In the 2004 Abatement Schedule, Goldberg argued that abatement should
    be granted for this period because allegedly RA Knighton’s case activity log
    shows that she “worked 1/51 of an hour on the file” during this period.38 This
    argument reflects Goldberg’s misunderstanding of how RA Knighton documented
    her time. The same mistake permeated Goldberg’s request for interest abatement
    for Period 8. 
    See supra
    pt. III.M.
    38
    In his simultaneous answering brief, Goldberg seemingly makes a
    concession, stating that “Petitioner does not disagree for 2 days” in response to the
    IRS’s opening brief that during the three days of Period 10, the IRS “did not
    commit any unreasonable errors or delays in the performance of a managerial or
    ministerial act.” For the reasons we 
    explained supra
    part III, pp. 53-54,
    Goldberg’s attempt to concede a number of days without providing the specific
    dates does not narrow the issues to be decided.
    - 97 -
    [*97]         2.    Events
    Over the three-day period, RA Knighton documented her time in the same
    way as she had during Period 8. The following image is excerpted from RA
    Knighton’s activity log for Period 10.
    As we explained for Period 
    8, supra
    part III.M, the notations of 1/1 and 1/51 do
    not indicate fractions of an hour. Instead the number to the left of the forward
    slash indicates the number of hours RA Knighton worked on that day, and the
    number to the right of the forward slash indicates the cumulative number of hours
    RA Knighton had worked to date. The above figure shows that RA Knighton
    worked for one hour on the Goldbergs’ 2004 joint income-tax return and one hour
    on their 2003 joint return during this period, Period 10. Cumulatively, she had
    worked 51 hours on the 2004 joint income-tax return and 1 hour on the 2003 joint
    income-tax return. Goldberg’s contention that RA Knighton worked less than one
    hour during the three-day span seems to arise from his misreading of her activity
    record.
    - 98 -
    [*98] We find, as we did for Period 
    8, supra
    part III.M, that Goldberg’s
    interpretation of RA Knighton’s entries in the case activity record was incorrect,
    and RA Knighton worked on the Goldbergs’ returns for a total of two hours during
    this three-day period: one hour on their 2003 return and one hour on their 2004
    return.
    3.    Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period, Period 10, because Goldberg has failed to identify or prove an
    unreasonable error or delay. See sec. 6404(e)(1); see also Foote v. Commissioner,
    at *23 (denying abatement where taxpayers failed to identify predicate act, i.e., an
    error or delay). The record does not show that RA Knighton worked less than an
    hour during this period. Instead, the record shows that during Period 10, RA
    Knighton worked one hour on the 2003 return and one hour on the 2004 return.
    Goldberg has not shown that working for a total of two hours is an unreasonable
    error or delay.
    Absent an error or delay (that is unreasonable) and a managerial act or
    ministerial act, interest abatement is not warranted. See sec. 6404(e)(1). Goldberg
    has failed to prove the existence of the predicate conditions for abatement of
    - 99 -
    [*99] interest. We hold the IRS did not abuse its discretion in denying interest
    abatement for this period, Period 10. See Banat v. Commissioner, slip op. at 6.
    P.     Intermediary period: September 26-28, 2008
    Goldberg does not seek interest abatement for this period. We describe the
    events of this period only to the extent that they bear on the periods at issue.
    After Period 10, September 23-25, 2008, the focus of the examination
    shifted entirely away from the Goldbergs’ involvement in the benefit plans (the
    section 419 issue). It seems that because the treatment of the plans had become a
    “national issue” RA Knighton had no control over the adjustment of the
    Goldbergs’ income arising from their involvement with the plans. All periods
    after Period 10 that were coextensive with the examination, Periods 11-20,
    focused on the Goldbergs’ carryover and carryback of NOLs and the
    substantiation of their bases in the stock and debt of their S corporations.
    On September 26, 2008, RA Knighton recorded that she worked for one
    hour on the Goldbergs’ 2003 joint income-tax return and one hour on their 2004
    joint income-tax return. The following day, on September 27, 2008, she recorded
    that she received an email from Goldberg in which he stated: “[I]t will take me a
    few days to get the [Form] 2848 to you”. Form 2848, “Power of Attorney and
    - 100 -
    [*100] Declaration of Representative”, is the form by which a taxpayer authorizes
    a representative to deal with the IRS.
    Q.     Period 11: September 29 through November 13, 2008
    1.    Introduction
    The Office of Appeals denied interest abatement for the 46 days from
    September 29 through November 13, 2008. On the 2004 Abatement Schedule
    Goldberg argued that abatement should be granted for this period because
    allegedly RA Knighton’s “activity record shows that she was working on other
    cases” and not the Goldbergs’ case during this period.
    2.    Events
    During this 46-day period, RA Knighton’s activity log shows that she was
    working on the Goldbergs’ examination. Her activity log shows four entries,
    dated September 29, October 6 and 10, and November 13, 2008.
    On September 29, 2008, RA Knighton received the Goldbergs’ signed
    Form 872-I. This Form 872-I extended the period of limitations for assessment for
    the Goldbergs’ 2004 tax year to June 30, 2009. That day, RA Knighton forwarded
    the signed Form 872-I to the IRS unit that processes such forms and sent the
    Goldbergs an approved copy.
    - 101 -
    [*101] She charged a total of three hours, on October 6 and 10, 2008, to
    completing and mailing a “report” to the Goldbergs. It seems that the report stated
    RA Knighton’s findings from her examination for the Goldbergs’ 2004 tax year.
    However, it was only a preliminary report that RA Knighton developed in
    anticipation of the expiration of the period of limitations on assessment for the
    Goldbergs’ 2004 tax year. It was based on the limited information she had
    received from Goldberg. The final report was not developed until April 29, 2011.
    It seems likely that RA Knighton may not have been able to do much more with
    the Goldbergs’ 2004 examination at this time because she was still waiting for
    them to submit outstanding information and the Forms 2848, “Power of Attorney
    and Declaration of Representative”.
    Before the start of this period, Period 11 (September 29 to November 13,
    2008), Goldberg had asked RA Knighton to work with his representative. He
    made this request in an email dated September 25, 2008. 
    See supra
    pt. III.O, p. 97
    (Period 10). RA Knighton replied that she “would work with whomever he
    wanted * * * [her] to [work with] as long as the appropriate [Form] 2848 was
    completed and filed allowing * * * [her] to do so.” In order for the IRS to work
    with a representative of the Goldbergs, both Goldberg and his wife would need to
    sign a Form 2848 and send it to the IRS. Shortly after Goldberg made his
    - 102 -
    [*102] September 25, 2008 request, RA Knighton sent Goldberg two Forms 2848.
    Apparently they were blank.
    The person who had been the Goldbergs’ tax-return preparer was Jeff
    Dubow. Jeff Dubow had a son of the same name who was also a tax professional.
    The record reveals that Dubow (the father) had passed away as of May 26, 2009,
    and he had been alive as of June 2007.
    On November 13, 2008, RA Knighton received a completed Form 2848
    from lawyers with the law firm of Ryan, Rapp & Underwood, P.L.C., that
    authorized those lawyers to represent Goldberg with the IRS regarding the specific
    issue of the Niche section 419A plan. This day was the final day of this period,
    Period 11. That November 13, 2008 communication was the last that RA
    Knighton heard from the Goldbergs or their representatives until six months later,
    in May 2009 (a date that is in Period 12).
    On June 8, 2009, RA Knighton received from Dubow (the son) a Form 2848
    that authorized him to represent the Goldbergs without any limitation to a
    particular issue.
    In conclusion, we find that RA Knighton did perform work on the
    Goldbergs’ 2004 examination during this period and that one of the Goldbergs’
    representatives provided a Form 2848 on the final day of Period 11, and the other
    - 103 -
    [*103] did not provide a Form 2848 until June 2009. We also find that any delay
    that occurred during this period was attributable to Goldberg.
    3.     Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period, Period 11. Though a delay occurred, it was not caused by RA Knighton.
    Rather, a significant aspect of the delay is attributable to Goldberg.
    Under section 6404(e)(1), the IRS may not abate interest where a
    “significant aspect of * * * [the] error or delay can be attributed to the taxpayer
    involved”. See also Braun v. Commissioner, slip op. at 13-14 (noting actions of
    both the IRS and taxpayer caused delay, but denying interest abatement because
    taxpayer’s “actions constituted a significant cause of the delay” (emphasis added)).
    The phrase “attributable to” means “due to, caused by, or generated by.”
    Lawinger v. Commissioner, 
    103 T.C. 428
    , 435 (1994). If a significant aspect of an
    error or a delay is attributable to the taxpayer’s representative, then it is attributed
    to the taxpayer. See, e.g., Foote v. Commissioner, at *24-*25.
    Section 301.6404-2(c), Example (13), Proced. & Admin. Regs., describes a
    situation analogous to Goldberg’s. In Example 13, the taxpayer moved from one
    state to another in the midst of the IRS’s examination of his income-tax return.
    The taxpayer asked that the examination be transferred to the IRS office closer to
    - 104 -
    [*104] his new address, and the IRS complied with this request.
    Id. The taxpayer
    moved again and again requested that the examination be transferred.
    Id. The IRS
    complied with the taxpayer’s second request.
    Id. Example 13
    states that the
    taxpayer’s repeated moves caused “a delay in the completion of the examination.”
    Id. Therefore, any
    interest that accrued because of this delay could not be abated
    under section 6404(e) “because a significant aspect of this delay is attributable to
    the taxpayer.”
    Id. Significant aspects
    of the delays during this period, Period 11, were caused
    by (1) Goldberg, (2) the Goldbergs’ representatives, or (3) both. On September
    25, 2008, a few days before the start of this period, Period 11, Goldberg had asked
    RA Knighton to work with his representatives to complete the examination. She
    agreed and waited to receive the Form 2848. She received Ryan, Rapp &
    Underwood’s form on the final day of this period (November 13, 2008). She
    received Dubow’s form more than six months later, on June 9, 2009. Like the
    taxpayer in Example 13, Goldberg had asked RA Knighton to perform the
    examination in a way that was most convenient for him, and RA Knighton
    complied with Goldberg’s request. His representatives did not deliver the
    necessary consents to allow RA Knighton to move forward with Goldberg’s
    request to work with his representatives, which in turn caused a delay. Because
    - 105 -
    [*105] these delays are fully attributable to Goldberg, abatement of interest is not
    available for this period under section 6404(e)(1). See Foote v. Commissioner,
    at *25. Thus, we hold it was not an abuse of discretion to deny interest abatement
    for this period.
    R.     Intermediary period: November 14, 2008, through May 28, 2009
    Goldberg does not seek interest abatement for this six-month period. We
    describe the events of this period to provide a complete background.
    During November 14, 2008, through May 26, 2009, RA Knighton
    documented that she had not received any information from Goldberg or the Form
    2848 from Dubow (the son) that would authorize him to act on behalf of the
    Goldbergs. She experienced radio silence from Goldberg while she worked on
    other section 419 cases and on “priority work.” During this six-month period, she
    worked a total of four hours on the Goldbergs’ 2003 examination and three hours
    on their 2004 examination.
    As of May 12, 2009, RA Knighton was waiting for information about the
    Goldbergs’ bases in their S corporation shares and debt. This information had
    been requested in the September 2007 IDR and in other communications. RA
    Knighton was also waiting for the Goldbergs to execute the Form 2848 to grant
    powers of attorney to Dubow (the son). She did not receive Form 2848 from
    - 106 -
    [*106] Dubow (the son) until June 2009, and Goldberg did not provide all the S
    corporation basis information until December 8, 2010.
    RA Knighton prepared to both finalize her report and prepare a second
    Form 872-I, “Consent to Extend the Time to Assess Tax as Well as Tax
    Attributable to Items of a Partnership”.39 This report, however, was a preliminary
    report seemingly made in anticipation of the expiration of the period of limitations
    on assessment for the Goldbergs’ 2004 tax year. The final report was not
    completed until April 29, 2011.
    On May 15, 2009, RA Knighton sent the preliminary report and a second
    Form 872-I to the Goldbergs and to Ryan, Rapp & Underwood. Eleven days later
    on May 26, 2009, Goldberg emailed RA Knighton to confirm he had received the
    preliminary report and the Form 872-I. Goldberg also told RA Knighton that he
    thought she was “working with his professionals regarding the resolution of these
    matters.” Goldberg’s “professionals” seem to refer to the people that Goldberg
    had intended to act as his and his wife’s representatives before the IRS: Dubow
    (the son) and attorneys with the firm of Ryan, Rapp & Underwood. Goldberg
    seems to have believed that between September 27, 2008 (the last day RA
    39
    This second Form 872-I extended the period of limitations for assessment
    of the Goldbergs’ 2004 income tax to December 31, 2010.
    - 107 -
    [*107] Knighton and Goldberg had communicated), and May 26, 2009, Dubow
    (the son) or attorneys with the firm of Ryan, Rapp & Underwood had been acting
    as Goldberg and his wife’s representatives and had provided RA Knighton with
    the information she had previously requested. Goldberg did not know that Dubow
    (the son) had not yet returned a completed Form 2848 to RA Knighton; Goldberg
    also seems to not have known that RA Knighton had not yet received any of the
    information she had requested in the September 2007 IDR.
    RA Knighton and Goldberg teleconferenced the following day, May 27,
    2009.
    S.    Period 12: May 29 through June 8, 2009
    1.    Introduction
    The Office of Appeals denied interest abatement for the 11 days from May
    29 through June 8, 2009. On the 2004 Abatement Schedule, Goldberg argued that
    abatement should be granted for this period. He alleged that RA Knighton’s need
    “to correct her own error” on a Form 872-I had caused a delay in processing the
    Goldbergs’ 2004 examination.
    2.    Events
    Form 872-I is used to document a taxpayer’s consent to extend the period of
    limitations on assessment of tax attributable to both partnership and
    - 108 -
    [*108] nonpartnership items. Some of the Goldbergs’ income and losses may
    have come from partnerships in which they were partners. When RA Knighton
    received the second signed Form 872-I on May 29, 2009, she realized that she had
    prepared the Form 872-I using the wrong date to extend the period of limitations.40
    The following business day (Monday, June 1, 2009) she emailed Goldberg alerting
    him of her error, and she faxed him a corrected Form 872-I.41 The Goldbergs
    returned the corrected Form 872-I by fax three days later on June 4, 2009. RA
    Knighton received the hard copies of the completed Form 872-I on June 8, 2009.
    At trial, RA Knighton testified that the error in the Form 872-I did not
    impede her ability to proceed with the “substantive elements of the * * *
    [examination]” during this period. During this 11-day span, RA Knighton
    documented six entries, with a total of one hour of work on the Goldbergs’ 2004
    examination. This one hour was spent communicating with Goldberg to get the
    corrected Form 872-I returned. She was not working on the substantive issues,
    40
    On brief, counsel for the IRS calls RA Knighton’s error a typographical
    error. We cannot determine the nature of the error because the erroneous Form
    872-I is not in the record.
    41
    At trial, RA Knighton testified that she sent them the corrected form on
    May 29, 2008, the same day she discovered the error. However, her activity log
    shows that she sent them the corrected form on June 1, 2008. We accord more
    weight to the activity log because it was made closer to the time of the activity,
    and more than eight years had elapsed between the event and the trial.
    - 109 -
    [*109] such as the claimed NOLs, in the Goldbergs’ 2004 examination during this
    time. We reiterate that RA Knighton had still not received the necessary
    shareholder basis information that she requested in (1) the September 2007 IDR;
    (2) correspondence surrounding the September 2007 IDR; and (3) a May 6, 2008
    email. Also, it was not until the final day of this period (June 8, 2009) that RA
    Knighton received the completed Form 2848 for Dubow (the son). Because RA
    Knighton had not yet received the shareholder basis information she needed to
    complete the examination, her date error could not have prolonged the
    examination or impeded her ability to work on the substantive issues of the
    examination. The examination was delayed because Goldberg or Dubow (the son)
    failed to deliver the needed documents.
    3.    Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period, Period 12. The IRS may abate an assessment of interest that is
    “attributable to” an IRS employee’s unreasonable error or delay. Sec. 6404(e)(1).
    We reiterate that “attributable to” means “due to, caused by, or generated by.”
    Lawinger v. Commissioner, 
    103 T.C. 435
    . If the accrual of interest is not
    caused by an IRS employee’s unreasonable error or delay, then the IRS need not
    abate interest under section 6404(e)(1).
    - 110 -
    [*110] Goldberg argues RA Knighton’s entry of an incorrect date on the Form
    872-I delayed the examination by 11 days, which caused 11 days of interest to
    accrue during Period 12. The thrust of Goldberg’s argument is that RA Knighton
    could have proceeded with the examination sooner if on May 29, 2009, she had
    received a signed and correct Form 872-I.
    Goldberg’s allegation that the assessment of 11 days of interest was
    attributable to RA Knighton’s error is not supported by the record. Instead, the
    record shows that RA Knighton could not complete the examination for the
    Goldbergs’ 2004 tax year without information about the Goldbergs’ bases in their
    shares and debt of their S corporation. This is information that RA Knighton had
    already requested on three separate occasions. Neither Goldberg nor the
    Goldbergs’ representatives had delivered this information before or during Period
    12 (May 29 through June 8, 2009). In fact, RA Knighton did not receive all of this
    information until December 8, 2010.
    Goldberg has not shown that the assessment of 11 days of interest was
    attributable to RA Knighton’s error. Even if RA Knighton had received a correct,
    signed Form 872-I on May 29, 2008, she could not have proceeded with the
    examination because she lacked the necessary information, which she had already
    requested multiple times.
    - 111 -
    [*111] As the petitioner, Goldberg has the burden of proving his entitlement to
    interest abatement under section 6404(e)(1). See Rule 142(a); Woodral v.
    Commissioner, 
    112 T.C. 23
    . He did not show that RA Knighton’s error caused
    interest to accrue during the 11 days of Period 12, a showing required by section
    6404(e)(1). It was not an abuse of discretion for the IRS to deny interest
    abatement for this period, Period 12.
    T.    Intermediary day: June 9, 2009
    Goldberg does not request interest abatement for this day. RA Knighton
    spent one hour working on the Goldbergs’ 2004 joint income-tax return on June 9,
    2009.
    U.    Period 13: June 10-15, 2009
    1.    Introduction
    The Office of Appeals denied interest abatement for the six days42 from June
    10-15, 2009. In the 2004 Abatement Schedule, Goldberg argued that abatement
    should be granted for this period because allegedly “no work” on the Goldbergs’
    42
    On the 2004 Abatement Schedule, Goldberg requested interest abatement
    for “5” days. Appeals seems to have correctly assumed Goldberg was requesting
    six days of interest abatement on the basis of the start and end dates he provided
    for Period 13.
    - 112 -
    [*112] 2004 examination was indicated in RA Knighton’s activity records. We
    find that work was indeed performed during this period.
    Before detailing the events of this period, we first discuss the general
    context of RA Knighton’s activities during this period. At some point before this
    period, RA Knighton communicated to Goldberg the need for him to provide her
    with additional information about the Goldbergs’ bases in the stock and debt of
    their wholly owned S corporation Wireless Distributors, Inc. Three requests for
    additional information were made before this period: in the September 2007 IDR;
    in correspondence surrounding the issuance of the September 2007 IDR; and in
    the May 6, 2008 email. In May 2009, Goldberg asked RA Knighton to work with
    Dubow on this issue of basis substantiation. We now discuss the events of
    Period 13.
    2.    Events
    During Period 13, RA Knighton made three entries for work performed on
    the Goldbergs’ 2004 joint income-tax return. On June 10 and 13, 2009, RA
    Knighton and Goldberg exchanged emails about information to substantiate the
    Goldbergs’ bases in their S corporation shares and debt. On June 15, 2009, the
    final day of this period, RA Knighton recorded working one hour on the 2004
    examination. In this one hour, as she documented, she talked with the Goldbergs’
    - 113 -
    [*113] representative, Dubow (the son), to request--as she already had done in the
    September 2007 IDR and by phone and email to Goldberg--information about the
    Goldbergs’ bases in their shares and debt of their wholly owned S corporations. In
    their conversation RA Knighton explained the basis issue to him and again
    requested the same information she had asked for a few times before. On June 15,
    2009, RA Knighton seems to have emailed Goldberg, Dubow (the son), or both of
    them about the information she needed to address the basis issues.
    Contrary to Goldberg’s assertion, we conclude that RA Knighton did
    perform work during this period. We further find that she asked the Goldbergs’
    representative to provide information for which she had already repeatedly asked.
    3.    Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period because Goldberg has failed to prove the existence of an unreasonable error
    or delay attributable to RA Knighton. Furthermore we find any error or delay that
    occurred during this period was attributable to Goldberg’s failure to provide
    information necessary to show the Goldbergs’ entitlement to a pass-through
    deduction for the losses of Wireless Distributors, Inc.
    Wireless Distributors, Inc. was an S corporation. In general, S corporations
    are not subject to income tax. Sec. 1363(a). Income and losses of an S
    - 114 -
    [*114] corporation affect its shareholders’ tax liabilities because an S
    corporation’s shareholders generally calculate their tax liabilities by taking into
    account their pro-rata share of the corporation’s “items of income * * *, loss, [or]
    deduction”. Sec. 1366(a)(1). The “aggregate amount of [the S corporation’s]
    losses and deductions taken into account by a shareholder” cannot exceed the sum
    of “the adjusted basis of the shareholder’s stock in the S corporation” and “the
    shareholder’s adjusted basis of any indebtedness of the S corporation to the
    shareholder”, each determined tax year by tax year. Sec. 1366(d)(1). Thus
    whether a shareholder can claim a pass-through deduction depends on whether he
    or she has a sufficient basis in his or her S corporation shares and debt the S
    corporation owes him or her.
    Id. A shareholder
    claiming a pass-through deduction, like the deduction
    claimed by the Goldbergs, is required to keep “such records” to substantiate that
    he or she has sufficient basis under section 1366(d)(1). Sec. 6001; see also sec.
    1.6001-1(a), Income Tax Regs. (providing records must be “sufficient to establish
    the amount of gross income, deductions, credits, or other matters required to be
    shown by * * * [the taxpayer] in any return of such tax or information”); see also
    Gianulis v. Commissioner, T.C. Memo. 2018-187, at *9-*11. The Goldbergs were
    - 115 -
    [*115] the only two shareholders in the S corporation, and Goldberg seems to have
    been in charge of its operations.
    The Goldbergs had claimed deductions for pass-through losses from
    Wireless Distributors, Inc., on their 2004 return, and RA Knighton had repeatedly
    asked before and during this period that the Goldbergs provide records to
    substantiate their bases in their stock in the S corporation and the debt the
    S corporation owed them. During this period, specifically on June 15, 2009, RA
    Knighton performed work. Contrary to Goldberg’s assertion that she did nothing
    during this period, she attempted to obtain information to substantiate the
    Goldbergs’ bases. Goldberg repeatedly failed to provide this information during
    this period, as well as in prior and subsequent periods. The record shows that any
    delay is fully attributable to Goldberg: he was to provide records to substantiate
    his and his wife’s bases in the pass-through entities, and he failed to do so despite
    repeated requests. Because no interest is abated where a significant aspect of the
    error or delay was caused by the taxpayer, sec. 6404(e)(1), the IRS did not abuse
    its discretion in declining to abate interest for this period.
    V.     Intermediary period: June 16-19, 2009
    Goldberg did not request abatement for this period. We describe it only to
    lend context to the other periods for which Goldberg requested abatement. The
    - 116 -
    [*116] only event documented for this period was RA Knighton’s receipt of an
    email from Goldberg on June 16, 2009.
    W.     Period 14: June 20 through July 27, 2009
    1.    Introduction
    The Office of Appeals denied interest abatement for the 38 days from June
    20 through July 27, 2009. In the 2004 Abatement Schedule, Goldberg argued that
    abatement should be granted for this period, alleging RA Knighton’s records
    reflect “no indication of any work done” on the Goldbergs’ 2004 examination.
    Before this 38-day period, Goldberg was made aware that RA Knighton was
    waiting for him or his and his wife’s representative to provide her with the
    additional information regarding the Goldbergs’ bases in their stock and debt of
    their wholly owned S corporations. RA Knighton had informed the Goldbergs’
    representative, Dubow (the son), of the need; and RA Knighton had communicated
    with Goldberg directly about the need for the information. Without this
    information, it appears that during this period, Period 14, RA Knighton could not
    work on the proper tax treatment of the items on the Goldbergs’ 2004 return.
    - 117 -
    [*117]      2.     Events
    During this 38-day period, RA Knighton communicated with Goldberg
    multiple times, sometimes by email and sometimes by telephone.43 She also
    documented one hour processing a Form 872-I that was returned to her by the
    group in the IRS that processes them. RA Knighton clarified to Goldberg (after
    she had already done so with Dubow, the son) what information was needed and
    answered his corollary questions. She needed information about the Goldbergs’
    bases in their S corporation shares and debt, which was information that she had
    requested in the September 2007 IDR; the correspondence surrounding the
    issuance of the September 2007 IDR; a May 6, 2008 email; and a June 15, 2009
    email. Despite RA Knighton’s reiterations of her need for information, during
    these 38 days in 2009 neither Goldberg nor Dubow (the son) provided RA
    Knighton with any of the necessary information until over one year later, on
    43
    RA Knighton documented receiving an email, dated July 23, 2009, in
    which Goldberg requested the contact information of a “Ms. Buffamonte * * *
    regarding a phone call * * * [he] got from her several weeks ago.” This may be
    the call that RA Knighton, her group manager, and Monika Buffamonte discussed
    during Period 17, infra part III.AA. That call apparently pertained to Goldberg’s
    examination for 1994. There, Buffamonte called Goldberg to ask him to stop
    making calls to the home of the IRS employee who was examining his 1994
    return.
    - 118 -
    [*118] October 20, 2010. Even then, the submission was incomplete. Goldberg
    did not supply all of the information until December 8, 2010.
    We find that RA Knighton did indeed perform work on the Goldbergs’
    examination during this 38-day period. However, because Goldberg or Dubow
    (the son) had failed to provide the information for which they had been repeatedly
    asked, during this period RA Knighton could not work on addressing the proper
    tax treatment of items on the Goldbergs’ 2004 return. Instead, her time was spent
    communicating with Goldberg or Dubow (the son).
    3.    Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period because Goldberg has failed to show an unreasonable error or delay
    attributable to RA Knighton. Any delay that occurred during this period was
    attributable to Goldberg’s failure to provide information necessary to show his and
    his wife’s entitlement to a pass-through deduction for the losses of Wireless
    Distributors, Inc. Specifically, Goldberg or Dubow (the son) failed to provide
    information about the Goldbergs’ bases in their stock of the S corporation and the
    debt the S corporation owed them. Our reasons for upholding the Office of
    Appeals’ denial of interest abatement are identical to those we gave to deny
    interest abatement in Period 1
    3, supra
    part III.U. In short, Goldberg or the
    - 119 -
    [*119] Goldbergs’ representative’s failure to provide the necessary documentation
    was a significant cause of any delay that occurred during this period. Because the
    IRS may not abate interest where a significant aspect of the error or delay was
    caused by the taxpayer, sec. 6404(e)(1), we hold the IRS did not abuse its
    discretion in declining to abate interest for this period.
    X.     Period 15: July 27, 2009, through August 9, 2010
    1.     Introduction
    The Office of Appeals denied interest abatement for the 379 days44 from
    July 27, 2009, through August 9, 2010. In the 2004 Abatement Schedule,
    Goldberg argued that abatement should be granted for this period, alleging RA
    Knighton’s activity log shows that RA Knighton “was working on other cases”
    and conducted “no activity on” the Goldbergs’ 2004 examination. We find that
    RA Knighton was indeed working on examinations other than the Goldbergs’
    2003 or 2004 examination. We also find that RA Knighton was unable to perform
    any work on the Goldbergs’ examination because Goldberg, the Goldbergs’
    representative, or both Goldberg and the Goldbergs’ representative failed to
    44
    On the 2004 Abatement Schedule, Goldberg requested interest abatement
    for “377” days. The Office of Appeals seems to have correctly assumed Goldberg
    was requesting 379 days of interest abatement on the basis of the start and end
    dates he provided for Period 15.
    - 120 -
    [*120] provide RA Knighton with the necessary information, despite her multiple
    requests.
    2.     Events
    As 
    explained supra
    , before this period, RA Knighton had repeatedly
    informed Goldberg and the Goldbergs’ representative that she needed additional
    information. They did not provide her with that information during this period.
    They barely even communicated with RA Knighton. This period began July 27,
    2009. Aside from a July 28, 2009 email addressing another issue, neither
    Goldberg nor the Goldbergs’ representative communicated with RA Knighton
    until over a year later, on August 9, 2010. Even then, Goldberg contacted RA
    Knighton only because she contacted him first.
    Between July 28, 2009, and August 9, 2010, RA Knighton documented
    working on other section 419 cases and “priority work”, which were apparently
    examinations that were not the Goldbergs’ 2003 or 2004 examination. Though
    Goldberg is correct that RA Knighton was working on other cases, his request for
    abatement ignores that she was unable to work on his case because he failed to
    provide her with the necessary information until October and December 2010,
    over a year after the first day of this period.
    - 121 -
    [*121] On August 9, 2010, the last day during this period, RA Knighton spoke to
    Goldberg about the imminent expiration of the period of limitation for assessment,
    the need for basis documentation, and an apparent issue with the Form 2848 for
    Goldberg’s wife. RA Knighton noted that her “time [was] charged to [o]ther
    years”. These “[o]ther years” seem to have been the year in which the NOL arose,
    which appears to be 2005 or 2006. We find that the Goldbergs’ examination was
    delayed, but the delay was caused by Goldberg or the Goldbergs’ representative’s
    failure to provide the necessary information to RA Knighton, despite her repeated
    requests.
    3.    Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period because significant aspects of the delay that occurred during this period
    were caused by Goldberg or the Goldbergs’ representative.
    Under section 6404(e)(1) the IRS may not abate interest where a
    “significant aspect of such error or delay can be attributed to the taxpayer”. In
    Foote v. Commissioner, at *24-*25, we held that delays caused by a taxpayer’s
    representative’s failure to deliver necessary documents were attributable to the
    taxpayer.
    - 122 -
    [*122] Like the delay in Foote, the 379-day delay coterminous with Period 15 was
    fully attributable to the petitioner, Goldberg, because, despite RA Knighton’s
    repeated requests, Goldberg or the Goldbergs’ representatives failed to provide the
    necessary documentation to substantiate the Goldbergs’ pass-through deductions.
    Specifically, Goldberg or the Goldbergs’ representatives failed to provide
    information about the Goldbergs’ bases in their S corporation shares and the debt
    the S corporation owed them. This basis information was necessary to determine
    the availability of the deduction that the Goldbergs had claimed on their 2004 tax
    return. As discussed in Period 1
    3, supra
    part III.U, taxpayers themselves are
    ordinarily the source of information regarding the deductions they have claimed.
    Absent this information, RA Knighton could not properly determine the
    Goldbergs’ 2004 income. Because any delay during this period is fully
    attributable to Goldberg, we hold it was not an abuse of discretion for the IRS to
    decline to abate interest. See sec. 6404(e)(1).
    Y.     Intermediary period: August 10 through November 14, 2010
    Goldberg does not request abatement for this period. The events in this
    period are significant for understanding the events in the periods for which
    Goldberg seeks interest abatement.
    - 123 -
    [*123] During this intermediary period, RA Knighton and Goldberg exchanged
    various communications. Significantly, Goldberg partially satisfied the September
    2007 IDR on October 20, 2010, with a package of documents containing a note
    stating more would be sent under separate cover. On November 15, 2010, RA
    Knighton, Monika Buffamonte (RA Knighton’s group manager at the time), and
    Goldberg spoke over the phone. RA Knighton and Buffamonte informed
    Goldberg that the section 419 issue had been turned over to the IRS’s national
    office. As a result of this turnover, RA Knighton’s regional office lacked control
    over the outcome of the section 419 issue. Buffamonte and RA Knighton
    recommended that Goldberg focus on documenting his and his wife’s bases in
    their S corporation stock and debt.
    Z.    Period 16: November 15 through December 8, 2010
    1.     Introduction
    The Office of Appeals denied interest abatement for the 24 days from
    November 15 through December 8, 2010. In the 2004 Abatement Schedule,
    Goldberg argued that abatement should be granted for this period, stating the
    “RA’s activity record shows [she was] busy with other cases” and therefore not
    working on his.
    - 124 -
    [*124]       2.    Events
    The last day of this period, December 8, 2010, is when Goldberg finally
    provided the information RA Knighton needed to analyze the pass-through
    deductions. This is information she had requested more than three years earlier in
    the September 2007 IDR.
    RA Knighton’s activity log states that on one day during this period--
    December 8, 2010--she was working on “older priority case work” that seems to
    have been for taxpayers other than the Goldbergs. We note she could not have
    worked on the Goldbergs’ examination because Goldberg had failed to deliver the
    needed documentation to her until that day. We find that RA Knighton did not
    work on the Goldbergs’ 2004 joint income-tax return during this period because
    she was waiting for information from Goldberg.
    3.    Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement during this
    period, Period 16, because Goldberg’s failure to provide the necessary documents
    until the final day of this period caused any delay of which he claims. The IRS
    may not abate interest where a “significant aspect of such error or delay can be
    attributed to the taxpayer”. Sec. 6404(e)(1). As we have 
    explained supra
    parts
    III.K (Period 7), III.Q (Period 11), III.U (Period 13), III.W (Period 14), and III.X
    - 125 -
    [*125] (Period 15), this means that the IRS may not abate interest where the delay
    was caused by a taxpayer’s failure to provide necessary information that had been
    requested by the examining agent. Foote v. Commissioner, at *24-*25.
    Goldberg’s failure to deliver necessary information caused the delay during this
    period. Interest abatement was not warranted under section 6404(e)(1). It was not
    an abuse of discretion for the IRS to so conclude for this period, Period 16.
    AA. Period 17: December 8, 2010, through January 3, 2011
    1.    Introduction
    The Office of Appeals denied interest abatement for the 27 days from
    December 8, 2010, through January 3, 2011. On the 2004 Abatement Schedule,
    Goldberg argued that abatement should be granted for this period, characterizing
    RA Knighton’s activity during this period thus: “Discussion about UNAX with
    her supervisor. Not related to this case”. UNAX is “[t]he willful unauthorized
    access or inspection of taxpayer records”. Internal Revenue Manual pt.
    10.8.1.4.1.3(1) (Dec. 16, 2006).45 We find no evidence of unauthorized access,
    nor do we find any grounds for interest abatement.
    45
    This was the version of this part of the IRM in effect between December
    16, 2006, and May 3, 2012.
    - 126 -
    [*126] As explained below, we believe that Goldberg’s allegations focus on a
    January 3, 2011 conversation regarding the activities in his 1994 examination.
    Therefore we begin the Events section for this period by explaining Goldberg’s
    1994 examination.
    2.     Events
    Goldberg’s 1994 return had been examined. We do not know if the 1994
    examination occurred concurrently with the Goldbergs’ 2003 and 2004
    examinations, and we do not know if the 1994 examination occurred during Period
    17. Buffamonte supervised the revenue agent who examined Goldberg’s 1994
    return. During the course of the 1994 examination, Goldberg had found the
    revenue agent’s home telephone number and called him at home on a Sunday. At
    some point during the 1994 examination Buffamonte had called Goldberg to tell
    him he should not call the revenue agent at home.
    On December 8, 2010, RA Knighton documented that she was working on
    cases that were neither the Goldbergs’ 2003 nor their 2004 examination; they were
    “older priority case[s]”. That day, she also documented having received all the
    information that she had first requested in the September 2007 IDR. 
    See supra
    pt.
    III.Z, p. 124 (Period 16).
    - 127 -
    [*127] On December 23, 2010, Goldberg emailed RA Knighton, telling her that he
    intended to file a “1203”46 complaint against Buffamonte, who had been RA
    Knighton’s group manager but (as of December 23, 2010) no longer was RA
    Knighton’s group manager. RA Knighton noted in her activity log that she did not
    respond to the December 23, 2010 email because she “want[ed] to verify that it is
    appropriate that * * * [she] give out this information at this time--* * *
    [Buffamonte was] no longer * * * [RA Knighton’s] GM.” RA Knighton noted in
    her activity log that she received this email, but she did not record the amount of
    time it took to read and consider it.
    On December 29, 2010, RA Knighton documented working one hour on the
    Goldbergs’ 2004 examination. She received an email that day from Goldberg in
    which he asked to revoke his and his wife’s consent to the extension of the period
    of limitations on assessment for their 2004 tax year. RA Knighton responded to
    his email, telling him that because the Goldbergs signed a Form 872-I, their
    consent was not revocable. RA Knighton called her group manager (whose name
    is not in the record) to discuss Goldberg’s request to revoke the consent and also
    46
    Goldberg’s reference to filing a “1203” appears to mean sec. 1203 of the
    Internal Revenue Service Restructuring and Reform Act of 1998, Pub. L. No. 105-
    206, 112 Stat. at 720. This section of the Act requires the Commissioner of
    Internal Revenue to terminate IRS employees for certain types of misconduct.
    Id. - 128
    -
    [*128] to discuss Goldberg’s December 23, 2010 request for Buffamonte’s badge
    number. RA Knighton’s group manager told RA Knighton that the Goldbergs
    could not revoke their consent and that RA Knighton should speak to Buffamonte
    about Goldberg’s request. RA Knighton’s notes say that she informed Goldberg
    that he and his wife could not revoke their consent.
    A couple of weeks later, on January 3, 2011, RA Knighton recorded
    working a total of four hours on the Goldbergs’ NOL carryback and dealing with
    an email request that Goldberg sent her that day. She did not document how much
    time she spent on each task.
    On the same day, January 3, 2011, Goldberg emailed RA Knighton, telling
    her he intended to file a “1203” complaint against Buffamonte because he believed
    she “was investigating his 1994 audit”. In that January 3, 2011 email to RA
    Knighton, Goldberg asked RA Knighton for (1) Buffamonte’s badge number and
    (2) the date of the conversation in which Buffamonte urged him to focus on
    substantiating his basis in Wireless Distributors, Inc. (That conversation related to
    the 2003 and 2004 examinations, and it occurred on November 15, 2010.)
    Goldberg’s belief that Buffamonte was investigating his 1994 examination seems
    to have somehow formed the basis for his allegation that RA Knighton spent her
    time discussing unauthorized access with her current group manager.
    - 129 -
    [*129] RA Knighton did not immediately respond to Goldberg’s email. Instead,
    on that day (January 3, 2011), RA Knighton forwarded Goldberg’s email to her
    group manager, and the two discussed how to proceed. RA Knighton’s group
    manager suggested that RA Knighton forward Goldberg’s email to Buffamonte
    and call her to discuss. RA Knighton sent Buffamonte Goldberg’s email and
    called her. In their phone call Buffamonte told RA Knighton that she could give
    Buffamonte’s badge number to Goldberg. Buffamonte also explained what she
    thought Goldberg meant when he said that she “was investigating his 1994 audit”.
    She explained that during the course of an examination for Goldberg’s 1994 tax
    year, Goldberg had looked up the revenue agent’s home phone number and called
    him at home on a Sunday. Buffamonte told RA Knighton that she had supervised
    that revenue agent and that she had called Goldberg to tell him he should stop
    calling the revenue agent at home.
    On January 3, 2011, after speaking to Buffamonte, RA Knighton called
    Goldberg to discuss her conversations with her group manager and Buffamonte.
    Her notes are cut off, but it appears that she provided him with Buffamonte’s
    badge number and the date of the conversation (November 15, 2010) as Goldberg
    had requested in his email. The record does not show whether Goldberg filed a
    “1203” complaint against Buffamonte.
    - 130 -
    [*130] We summarize the salient events that seem to relate to Goldberg’s
    argument that RA Knighton had a conversation about unauthorized access and that
    this conversation delayed his examination: On December 23, 2010, Goldberg
    asked RA Knighton for information related to Buffamonte, and RA Knighton
    seems to have not responded. On January 3, 2011, Goldberg asked for the same
    information a second time. In response, RA Knighton consulted with her
    supervisor about how to address Goldberg’s request, RA Knighton obtained the
    information Goldberg requested, and then RA Knighton complied with Goldberg’s
    request. Now, and before the Office of Appeals, Goldberg claims that he is
    entitled to interest abatement because RA Knighton spent time away from his
    2004 examination in order to comply with his request for information relating to
    Buffamonte.
    In conclusion, we find that during this period, RA Knighton worked on
    examinations other than the Goldbergs’ 2003 and 2004 tax years, worked on the
    examinations for the Goldbergs’ 2003 and 2004 tax years, and spent time
    responding to Goldberg’s request for information about Buffamonte. We find that
    Goldberg’s request for information about Buffamonte delayed the examination.
    - 131 -
    [*131]       3.     Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period because a significant aspect of the January 3, 2011 delay is attributable to
    Goldberg, and he has not shown how a single day’s delay would entitle him to the
    27 days of interest abatement he seeks for Period 17.47 Interest may not be abated
    under section 6404(e)(1) if a “significant aspect of * * * [the] error or delay can be
    attributed to the taxpayer involved”. As in Period 11, Example 13 in section
    301.6404-2(c), Proced. & Admin. Regs., describes a situation analogous to
    Goldberg’s. In Example 13, the taxpayer twice moves her residence and twice
    asks the IRS to transfer her examination to an office closer to her place of
    residence, and the IRS complies both times. 
    See supra
    pt. III.Q, pp. 103-104
    (Period 11). Example 13 states: “The taxpayer’s repeated moves result in a delay
    in the completion of the examination”, and under section 6404(e)(1), “interest
    attributable to this delay cannot be abated because a significant aspect of this delay
    is attributable to the taxpayer.”
    Here, during Period 17, a significant aspect of the delay was caused by
    Goldberg. On January 3, 2011, Goldberg asked RA Knighton to provide him with
    47
    We need not determine whether RA Knighton, her group manager, or
    Buffamonte’s actions constituted managerial or ministerial acts. Also, we need
    not determine if the delay was unreasonable.
    - 132 -
    [*132] information so that he could file a complaint against Buffamonte. RA
    Knighton complied and spent time fulfilling the request: She spoke to her
    supervisor, and then she spoke to Buffamonte. RA Knighton obtained the
    information Goldberg requested and then provided it to him. Fulfilling
    Goldberg’s request took time away from RA Knighton’s performing the
    substantive aspects of the Goldbergs’ 2004 examination. Had Goldberg not asked
    her to provide him with information about Buffamonte, the record shows that RA
    Knighton would have worked on the proper treatment of the Goldbergs’ NOLs for
    their 2003 and 2004 tax years. Like the taxpayer in Example 13, Goldberg
    introduced the cause of the delay. His request was the impetus for RA Knighton’s
    stopping her examination for the Goldbergs’ 2003 and 2004 tax years. Regardless
    of how long it took RA Knighton to get that information to Goldberg (and it could
    not have taken more than four hours), like the taxpayer in Example 13, Goldberg
    caused a significant aspect of the January 3, 2011 delay. Therefore he is not
    entitled to interest abatement for January 3, 2011.
    Goldberg has failed to show that the delay that occurred on a single day
    during this period entitles him to interest abatement for the 27 days of Period 17.
    We cannot grant blanket requests for interest abatement. See Corson v.
    Commissioner, T.C. Memo. 2009-95, slip op. at 16. Petitioners must not only
    - 133 -
    [*133] prove the existence of an unreasonable error or delay in performing a
    managerial or ministerial act, see Rule 142(a); they must also connect the error or
    delay with the “specific period for which interest should be abated”, Foote v.
    Commissioner, at *15. Here, Goldberg has failed to show that the January 3, 2011
    delay entitles him to 27 days’ interest abatement. Goldberg has also failed to show
    that any of the other events that occurred during Period 17 would entitle him to
    interest abatement under section 6404(e)(1). Instead, the record shows that RA
    Knighton spent Period 17 working steadily on the Goldbergs’ 2003 and 2004
    examinations.
    Where a significant aspect of a delay is caused by the taxpayer, the IRS may
    not abate interest under section 6404(e)(1). The IRS may not abate interest under
    section 6404(e)(1) unless the conditions of the section have been met. Because
    Goldberg caused a significant aspect of the delay on January 3, 2011, and there are
    no other grounds for interest abatement for Period 17, it was not an abuse of
    discretion for the Office of Appeals to deny interest abatement for this period. See
    Woodral v. Commissioner, 
    112 T.C. 23
    .
    BB. Intermediary period: January 4-6, 2011
    Goldberg does not request abatement during this period. We discuss the
    events of this period because they provide context for the events for which
    - 134 -
    [*134] Goldberg seeks interest abatement. During this period, RA Knighton
    worked for sixteen hours on the 2003 examination examining NOLs. She also
    performed research relating to the carryback of NOL deductions and Goldberg’s
    wife’s injured-spouse claim.
    CC. Period 18: January 7-10, 201148
    1.     Introduction
    The Office of Appeals denied interest abatement for the four days from
    January 7-10, 2011. In the 2004 Abatement Schedule Goldberg argued that
    abatement should be granted for this period, stating there was “no indication of
    work” performed on his 2004 examination in RA Knighton’s activity log.
    2.     Events
    The trial record shows that RA Knighton performed work on the Goldbergs’
    2004 joint income-tax return during this period, Period 18. During this period, RA
    Knighton documented a total of six hours of work on the Goldbergs’ returns, with
    three hours on their 2003 joint income-tax return and three hours on their 2004
    joint income-tax return. She worked all six hours on January 7, 2011.
    48
    In the 2004 Abatement Schedule, Goldberg wrote the start date as
    “1/7/2010” and the end date as “1/10/2011”, but he requested four days of interest
    abatement. The Office of Appeals seems to have determined that the entry of a
    2010 start date was a typographical error and construed it as a 2011 date.
    - 135 -
    [*135] On that day, RA Knighton contacted the Goldbergs’ representative, Dubow
    (the son), for injured-spouse information for 2003. Dubow (the son) faxed an
    undated copy of a Form 8379, “Injured Spouse Claim and Allocation”, that he
    seems to have prepared. RA Knighton also documented that she needed to seek
    assistance on the proper carryback of NOLs when the filing status of the taxpayers
    for the year the NOLs arose was different from that for the years to which they
    sought to carry them back. She determined the proper carryback of the NOLs
    would also be affected by the Goldbergs’ injured-spouse claim. On that day
    (January 7, 2011), RA Knighton contacted an IRS employee who had been an
    injured-spouse specialist.49 The record does not reveal why RA Knighton reached
    out to someone who was not currently an injured-spouse specialist.
    The record shows that RA Knighton did not work on the Goldbergs’ 2004
    joint income-tax return during the weekend of January 8 and 9, 2011.
    The following business day, Monday, January 10, 2011, RA Knighton
    received a response to her injured-spouse inquiry and was provided with an IRS
    contact, Russell Freitag, to answer her question about the NOL carryback. She
    49
    RA Knighton documented contacting an “innocent spouse” specialist on
    that day, but because of what she documented the previous day--referring to the
    issue as an “injured spouse” issue--we call it an injured-spouse issue.
    - 136 -
    [*136] contacted Freitag three days later on January 13, 2011. This is more fully
    detailed in the following period, Period 19, infra part III.EE.
    We reject Goldberg’s assertion that RA Knighton’s activity records indicate
    no work was performed during this four-day period of January 7-10, 2011.
    3.     Analysis and holding
    We uphold the Office of Appeals’ determination denying interest abatement
    for this period because Goldberg has failed to show the existence of any
    unreasonable error or delay in the performance of managerial or ministerial acts by
    RA Knighton, by the former injured-spouse specialist, or by Freitag. RA
    Knighton worked diligently on the case, stopping only to seek guidance on how to
    carry back the NOLs where there was an injured-spouse issue and to request
    additional information from the Goldbergs’ representative. Seeking guidance on
    the application of federal tax law--such as the availability of NOL deductions--is
    neither a managerial nor a ministerial act. Sec. 301.6404-2(c), Example (9),
    Proced. & Admin. Regs.
    The record shows that the former injured-spouse specialist returned RA
    Knighton’s call the following business day and provided RA Knighton with
    Freitag’s contact information. The IRS may abate interest only in the case of an
    “unreasonable error or delay”, sec. 6404(e)(1) (emphasis added), and Goldberg has
    - 137 -
    [*137] failed to show that a two-day, weekend delay is unreasonable, cf. Hull v.
    Commissioner, T.C. Memo. 2014-36, at *19 (finding “slight delay” not
    unreasonable); see also Larkin v. Commissioner, T.C. Memo. 2010-73, slip op.
    at 11-12.
    We hold that the IRS has not abused its discretion in denying interest
    abatement for this four-day period, Period 18, because the statutory prerequisites
    of section 6404(e)(1) have not been met.
    DD. Intermediary period: January 11-12, 2011
    Goldberg does not request abatement for this period. The record does not
    show any activity during this period.
    EE.   Period 19: January 13 through February 15, 2011
    1.     Introduction
    The Office of Appeals denied interest abatement for the 34 days50 from
    January 13 through February 15, 2011. On the 2004 Abatement Schedule,
    Goldberg argued that abatement should be granted for this period, alleging RA
    Knighton’s “[case] activity records show[] she was working on” other taxpayers’
    50
    On the 2004 Abatement Schedule, Goldberg requested interest abatement
    for “24” days. The Office of Appeals seems to have correctly assumed Goldberg
    was requesting 34 days of interest abatement on the basis of the start and end dates
    he provided for Period 19.
    - 138 -
    [*138] cases and not his during this period. We find that RA Knighton was
    working on the Goldbergs’ case as well as other cases during this period.
    2.    Events
    During this period, Period 19, it appears that RA Knighton performed work
    on the Goldbergs’ 2003 and 2004 income-tax returns on the first and last days of
    the period, January 13 and February 15, 2011, respectively. In between those two
    dates, she noted a “[d]elay in [the] case” because she was “working [other] short
    statute cases.” Such cases, RA Knighton explained at trial, are “always our
    highest priority.” This prioritization policy, she believed, was an IRS policy.
    On January 13, 2011, she called Freitag to figure out how to carry back
    NOLs to years when the taxpayers’ filing status differed from that for the loss year
    and how the Goldbergs’ injured-spouse claim affected the NOL carryback. On
    February 15, 2011, RA Knighton spent five hours preparing a “report”, time that
    she charged to the Goldbergs’ 2003 joint income-tax return. The record is not
    clear, but it appears that this report was the Revenue Agent Report, which includes
    a Form 4549, “Income Tax Examination Changes” (which we refer to as the
    February 2011 Form 454951) and lead sheets. RA Knighton used the lead sheets to
    51
    The record contains four iterations of the Form 4549, dated May 15, 2009;
    January 4, 2011; February 17, 2011; and May 11, 2011.
    - 139 -
    [*139] provide more detailed explanations of the proposed adjustments. This
    version of the report was not the final version; it was another preliminary version.
    The Goldbergs did not receive the final report until sometime between April 30
    and May 11, 2011.
    In conclusion, we find that RA Knighton was working on the Goldbergs’
    examination and other higher priority cases during this period.
    3.     Analysis and holding
    We uphold the Office of Appeals’ denial of interest abatement for this
    period because Goldberg has failed to show a managerial or ministerial act. RA
    Knighton worked on the Goldbergs’ 2003 and 2004 joint income-tax returns but
    prioritized working on other taxpayers’ cases during this period. When there were
    tasks to perform related to the Goldbergs’ 2004 joint income-tax return and tasks
    to perform related to other taxpayers’ returns, she performed tasks related to other
    taxpayers’ returns before performing the task related to the Goldbergs’ 2003 and
    2004 joint income-tax returns. As we explained in Period 
    4, supra
    part III.F, p. 73,
    a revenue agent’s “prioritiz[ation] of work and caseloads is not a managerial or
    ministerial act.” See Hornbacker v. Commissioner, at *19; see also sec. 301.6404-
    2(c), Examples (7) and (8), Proced. & Admin. Regs.
    - 140 -
    [*140] Because interest may not be abated absent a showing of a managerial or
    ministerial act, we hold that the IRS’s decision not to abate interest for this period
    was not an abuse of discretion.
    FF.    Intermediary period: February 16 through March 28, 2011
    Goldberg does not request interest abatement for this period. We explain it
    to provide useful background.
    During this intermediary period, RA Knighton printed and mailed to the
    Goldbergs the February 2011 Form 4549, on which she had entered $22,056.71 of
    statutory interest due in line 19.c for the Goldbergs’ 2004 tax year. Goldberg
    received the February 2011 Form 4549 either on or before February 24, 2011.
    RA Knighton and Goldberg exchanged emails and phone calls during this
    period; after some back and forth, Goldberg requested a conference call, which
    occurred on March 3, 2011. The call included Goldberg, someone named Mike
    Smith,52 RA Knighton, RA Knighton’s group manager, and a section 419
    coordinator from the IRS.
    52
    Mike Smith appears to be an accountant, plan administrator, or other non-
    attorney advisor to the Goldbergs. The Goldbergs never gave Smith power of
    attorney.
    - 141 -
    [*141] At the time of the call, three issues were not fully resolved by or correctly
    treated in the February 2011 Form 4549. First, there was a redundant amount
    included in the adjustment to tax arising from the Niche section 419A plan.
    Second, the Goldbergs’ alternative minimum tax had been either incorrectly
    computed or reported. And third, some of the basis substantiation issues from one
    of the S corporations, Wireless Distributors, Inc., were still outstanding.
    After the March 3, 2011 conference call, Goldberg sent RA Knighton an
    electronic file of information intended to address those three issues. The February
    2011 Form 4549 was subsequently revised on the basis of Goldberg’s additional
    submissions.
    GG. Period 20: March 29 through April 15, 2011
    1.    Introduction
    The Office of Appeals denied interest abatement for the 18 days from March
    29 through April 15, 2011. In the 2004 Abatement Schedule, Goldberg argued
    that abatement should be granted for this period, alleging the “RA’s activity
    record” shows that she performed “duplicative work” and that his examination was
    delayed because RA Knighton’s “supervisor was not available”. We reject both
    allegations: that RA Knighton duplicated work and that RA Knighton’s
    supervisor was not available.
    - 142 -
    [*142]       2.       Events
    The record does not show that RA Knighton was doing duplicative work or
    that her supervisor was not available during this period. Instead, it shows that
    during this period, Goldberg emailed RA Knighton once and that she reviewed the
    electronic package of information that Goldberg sent her after the March 3, 2011
    conference call. It further shows that RA Knighton communicated with other IRS
    employees to analyze whether the Goldbergs had sufficient bases in their S
    corporation shares and debt to claim deductions.
    We assume that Goldberg’s reference to RA Knighton’s “duplicative work”
    has to do with the redundant amount included in the proposed adjustment to tax
    that was made in the February 2011 Form 4549 and discussed during the March 3,
    2011 conference call. Though the calculation contained a duplicative amount,
    there is no evidence in the record that RA Knighton was doing duplicative work
    during this period.
    Nothing in the record even hints at the fact that RA Knighton’s supervisor
    was not available during this period. And Goldberg has failed to explain the
    relevance of this assertion.
    We conclude that the record does not suggest either that RA Knighton
    performed duplicative work or that RA Knighton’s supervisor was not available.
    - 143 -
    [*143] Further, Goldberg has not shown that even if RA Knighton’s supervisor
    were unavailable, such unavailability would be relevant to his claim for interest
    abatement.
    3.    Analysis and holding
    We uphold the IRS’s denial of interest abatement for this period because
    Goldberg has failed to prove the occurrence of an unreasonable error or delay in
    performing a managerial or ministerial act. He has not proven that during this
    period RA Knighton performed duplicative work, RA Knighton’s supervisor was
    unavailable, or any other facts that would constitute an unreasonable error or
    delay.
    The taxpayer bears the burden of proving the IRS’s denial of interest
    abatement constituted an abuse of discretion--that it was arbitrary, capricious, or
    lacked a “sound basis in fact or law.” Woodral v. Commissioner, 
    112 T.C. 23
    ;
    see Rule 142(a). “The mere passage of time” does not establish an unreasonable
    error or delay. Lee v. Commissioner, 
    113 T.C. 145
    , 150 (1999). Instead, the
    taxpayer must specify and prove the grounds for interest abatement for each
    period. See Rule 281(b)(3); cf. Corson v. Commissioner, slip op. at 15 (“A
    request demanding abatement of all interest charged does not satisfy the required
    link; it merely represents a request for exemption from interest.”). Where the
    - 144 -
    [*144] taxpayer has failed to prove that a managerial or ministerial error or delay
    occurred in the period for which interest abatement is requested, we have found no
    abuse of discretion in the IRS’s denial. E.g., A-Valey Engineers, Inc. v.
    Commissioner, T.C. Memo. 2012-199, slip op. at 13-14.
    Goldberg has failed to prove that an error or delay occurred during this
    period, Period 20. He alleged that during Period 20 RA Knighton performed
    duplicative work and that her supervisor was unavailable. The record does not
    support either of these allegations, nor does it show that unalleged events led to an
    error or delay. Though RA Knighton’s activity log shows that a low amount of
    activity occurred during this period, this fact alone is insufficient to satisfy
    Goldberg’s burden of proof because “[t]he mere passage of time” does not
    establish an unreasonable error or delay, Lee v. Commissioner, 
    113 T.C. 150
    , let
    alone a managerial or ministerial act. Because Goldberg failed to prove the
    existence of an error or delay during the CDP hearing and at trial, we hold it was
    not an abuse of discretion for the IRS to deny interest abatement for this period.
    HH. Intermediary period: April 16-28, 2011
    Goldberg does not request abatement for this period. The record does not
    show any activity during this period.
    - 145 -
    [*145] II.    Period 21: April 29 through August 23, 2011
    We do not analyze Goldberg’s entitlement to interest abatement for this
    period because the IRS concedes that Goldberg is entitled to interest abatement for
    this period. We describe the events of this period to provide a complete
    background.
    The Goldbergs’ 2003 and 2004 examinations concluded in April 2011. On
    April 29, 2011, RA Knighton prepared the final Form 4549 relating to 2003 and
    2004. We referred to this version of the Form 4549 as the May 2011 Form 4549.
    We detailed the contents of the May 2011 Form 4549 supra part II, pp. 42-44. RA
    Knighton also prepared various lead sheets that more fully explained these
    changes to the Goldbergs’ tax liabilities. The May 2011 Form 4549 showed that
    they owed $46,865 in additional tax for 2004. In this final Form 4549, “0.00” was
    entered in the line providing for interest, line 19.c. At trial RA Knighton
    explained that she did not compute the interest on the May 2011 Form 4549
    because the interest on the Goldbergs’ underpayment involved “restricted interest”
    which she was unable to calculate.53
    53
    In general, the IRS must pay a taxpayer interest on an overpayment for the
    time it has the use of the taxpayer’s money, sec. 6611(a), and a taxpayer must pay
    interest on an underpayment “for the time the taxpayer has the use of the
    government’s money”, Rev. Proc. 60-17, sec. 2.01(1), 1960-2 C.B. 942, 942
    (continued...)
    - 146 -
    [*146] The Goldbergs received and signed the May 2011 Form 4549, which was
    dated May 11, 2011. Above their signatures, the May 2011 Form 4549 states:
    I give my consent to the immediate assessment and collection of any
    increase in tax and penalties, and accept any decrease in tax and
    penalties shown above, plus additional interest as provided by law.[54]
    On August 1, 2011, the IRS assessed an underpayment amount of $46,865,
    and the assessed interest on that amount was $20,210.27. The underpayment
    amount had been shown on the May 2011 Form 4549. The interest had not. On
    the same date, August 1, 2011, the IRS mailed a CP 22 notice, to inform Goldberg
    of the amounts due.55
    53
    (...continued)
    (referring to sec. 6601(a)). However, there are some provisions of the Internal
    Revenue Code that “limit or prohibit interest under certain conditions”.
    Id. sec. 2.01(2),
    1960-2 C.B. at 943. These provisions create a type of interest called
    “restricted interest”.
    Id. Some of
    the Code provisions that can give rise to
    restricted interest include sec. 172(b) (2002) (NOL carrybacks), amended by Tax
    Cuts and Jobs Act of 2017, Pub. L. No. 115-97, sec. 13302(b)(1)(A), 131 Stat. at
    2122, and sec. 6411(b) (tentative carryback allowance). See Rev. Proc. 60-17, sec.
    2.02(1), 1960-2 C.B. at 943. RA Knighton’s case activity log shows that the
    restricted interest came from the NOL carrybacks.
    54
    Sec. 6601(a) of the Internal Revenue Code provides that the IRS will
    charge interest on underpayments and nonpayments of tax. Interest begins to
    accrue on the date that the payment was due.
    Id. 55 The
    actual CP 22 notice is not in the record; the parties stipulated the
    August 1, 2011 assessment and mailing of the CP 22 notice.
    - 147 -
    [*147] Three weeks later, on August 23, 2011, the Goldbergs paid $50,000 toward
    their 2004 tax liability. This $50,000 was applied against their 2004
    underpayment and part of the interest due on it. The $50,000 did not cover all the
    interest due on the 2004 underpayment. We mentioned this payment supra part I,
    p. 22.
    JJ.   Period 22: August 24, 2011, through June 26, 2013
    1.    Introduction
    The Office of Appeals denied interest abatement for the 673 days56 from
    August 24, 2011, through June 26, 2013. In the 2004 Abatement Schedule,
    Goldberg argued that abatement should be granted for this period, alleging there
    was a “delay in processing [his interest-abatement] claim” that was not resolved
    “until [his] court petition [was] filed”.
    2.    Events
    This period is long and complex; we have separated our explanation of it
    into various stages.
    56
    On the 2004 Abatement Schedule, Goldberg requested interest abatement
    for “671” days. The Office of Appeals seems to have correctly assumed Goldberg
    was requesting 673 days of interest abatement on the basis of the start and end
    dates he provided for Period 22.
    - 148 -
    [*148]             a.     Final notice of intent to levy and Goldberg’s claim for
    interest abatement
    Less than a month after submitting the $50,000 payment on August 23,
    2011, the Goldbergs received Letter 1058, “Final Notice of Intent to Levy and
    Notice of Your Right to a Hearing”, on September 8, 2011.
    The parties stipulated that “[o]n or around September 9, 2011, * * *
    [Goldberg] submitted Form 843, Claim for Refund and Request for Abatement for
    2004.” The Form 843 is in the record. Only Goldberg signed the Form 843; his
    wife did not. Form 843 provides various boxes for a taxpayer to indicate the
    reasons for requesting a refund or abatement. Goldberg checked two boxes: the
    box for income-tax abatement or refund and the box that said “[i]nterest was
    assessed as a result of IRS errors or delays”, the interest-abatement box. On the
    Form 843, he sought a refund of $67,075.22, which is approximately equal to the
    2004 deficiency and interest assessed on it. On the Form 843, Goldberg attempted
    to challenge the assessment of a $46,865 deficiency and the interest on it. On that
    form, Goldberg made the Captain Douglas J. Brown, Inc. argument. On that form
    he also alleged that there were “Mangerial [sic] delays of the time taken to perform
    the audit due to examiners [sic] case load being reassigned to other cases”.
    - 149 -
    [*149] Goldberg’s Form 843 did not explain the allegation about “[m]angerial
    [sic] delays” or specify any particular action that was delayed.
    Between September 2011 and September 2012, Goldberg received multiple
    letters from the IRS requesting an additional 45 days to process the Form 843.
    The record does not contain any of these letters, but Goldberg credibly testified to
    his having received them. In this year-long period, Goldberg also received calls
    from the IRS’s Collection Department. It is not entirely clear when Goldberg was
    informed that his claim for interest abatement was denied, though he eventually
    was told it was denied.57
    b.       Contact with Taxpayer Advocate Service
    On September 10, 2012, about a year after Goldberg had filed the Form 843,
    he contacted the Taxpayer Advocate Service to get assistance with the claims he
    made on the Form 843. The Taxpayer Advocate Service became involved in
    Goldberg’s efforts to get his Form 843 claims resolved. The record suggests that
    thereafter, he was contacted by Lindsay O’Neil from the IRS’s Interest Abatement
    Group sometime between October 1 and 26, 2012.
    57
    The record shows that the May 28, 2013 notice of determination was the
    first time that Goldberg had been notified in writing of the denial of the claims
    made on the Form 843. The notice of determination is discussed in Period 22,
    infra part III.JJ.2.e.
    - 150 -
    [*150] O’Neil did not explain to Goldberg why for the prior 13 months (i.e.,
    September 2011 to September 2013) the IRS had sent him letters stating it needed
    45 additional days to process his Form 843 claim. Instead, O’Neil told Goldberg
    that she would refer his claim for audit reconsideration, presumably because most
    of his claim on the Form 843 focused on the Captain Douglas J. Brown, Inc.
    argument, which effectively asserted that RA Knighton had failed to apply the
    Captain Douglas J. Brown, Inc. stipulation of settled issues to his examination
    findings.58 This failure, reasoned Goldberg, resulted in RA Knighton’s allegedly
    erroneous finding that the Goldbergs had underpaid their 2004 tax liability by
    $46,865. We previously discussed the arguments made on the Form 843 supra
    part I, pp. 23-24.
    c.   IRS files notice of lien
    On October 30, 2012, the IRS filed a notice of lien with Lake County,
    Illinois, for $17,071.22, and it sent the Goldbergs the notice of the lien filing
    (Letter 3172 (DO)) on November 1, 2012. The lien-filing notice stated that the
    Goldbergs had a right “to a hearing with * * * [the IRS] to appeal this collection
    58
    It is not clear that the audit reconsideration ever occurred. The Taxpayer
    Advocate Service documented that audit reconsideration had occurred and that
    Goldberg appealed the audit reconsideration group’s determination to the Office
    of Appeals. However, the Office of Appeals did not document the findings or
    determination of the audit reconsideration group.
    - 151 -
    [*151] action”. The lien-filing notice stated the “Amount on Lien” for the 2004
    tax year was $17,071.22. It also stated that the date of assessment was August 1,
    2011, in the amount due for the 2004 tax year. The lien amount ($17,071.22) is
    the approximate difference between the 2004 tax liability assessed on August 1,
    2011 ($67,075.27), and the Goldbergs’ August 23, 2011 $50,000 payment. The
    2004 tax liability comprised $46,865 in underpayment and $20,210.27 in interest
    on that underpayment. The lien amount, $17,071.22, seems to represent the
    amount of unpaid interest on the Goldbergs’ 2004 liability.59
    d.    Collection-due-process proceedings
    Goldberg timely filed a Form 12153, “Request for a Collection Due Process
    or Equivalent Hearing”, on November 14, 2012. See sec. 301.6320-1(b), Proced.
    & Admin. Regs. Goldberg’s wife did not sign the Form 12153. On the Form
    12153, Goldberg made three arguments: the Captain Douglas J. Brown, Inc.
    argument, the Form-4549-as-a-contract argument, and his entitlement to interest
    59
    Because the $50,000 payment did not cover the entire $67,075.27 in 2004
    tax liabilities, we assume that the IRS followed its ordinary procedure and applied
    the $50,000 payment first against the $46,865 underpayment and then against the
    interest due. See Rev. Proc. 2002-26, sec. 3.02, 2002-1 C.B. 746, 746. Though
    the IRS will honor taxpayers’ written directions “as to the application of the
    payment” of tax,
    id. sec. 3.01,
    the record does not show that the Goldbergs had
    provided specific directions as to the application of the August 23, 2011 $50,000
    payment.
    - 152 -
    [*152] abatement argument.60 Goldberg’s third argument was that he should not
    be liable for interest because it accrued during the 13 months that the IRS took to
    process his Form 843, on which he submitted his claim for interest abatement.
    The allegations in the Form 12153 correspond with the allegations Goldberg
    raised on remand for Period 22 in the 2004 Abatement Schedule.61
    Goldberg had a telephone CDP conference on January 10, 2013, with
    Appeals Officer Marcus S. Morgan.
    During the four months between the date of the CDP conference and the
    date that the Office of Appeals sent Goldberg the notice of determination, Morgan
    and his manager gathered additional information, worked with other team
    members to draw legal conclusions, and determined what had happened to
    60
    On the basis of these arguments, Goldberg sought a refund of all payments
    made on his joint liability for 2004, additional refund moneys credited to his
    account, and that the lien be “voided and recalled”.
    61
    The Form 12153 stated that Goldberg had “filed the [Form] 843 * * * in
    September of 2011. The * * * [Goldbergs] received several letters from [the
    IRS’s] collections [unit] stating over and over that it needed more time to process
    * * * [Goldberg’s] request.” And in “October 2012, almost 13 months later * * *
    [Goldberg’s Form] 843 was answered by Ms. Lindsay O’Neil, Interest Abatement
    Coordinator”.
    The 2004 Abatement Schedule’s allegation for Period 22 was that there was
    a “delay in processing [the] claim for [a]batement”. The claim for abatement
    referred to in the 2004 Abatement Schedule is the claim made on the Form 843 in
    September 2011, which Goldberg refers to in the Form 12153.
    - 153 -
    [*153] Goldberg’s Form 843. Morgan documented spending 11.75 hours on
    Goldberg’s claim during this four-month period and a total of 15.25 hours from
    the date Goldberg filed his Form 12153 to when the notice of determination was
    issued.
    e.    Notice of determination
    More than four months after the CDP conference, on May 28, 2013, the
    Office of Appeals issued Goldberg a Notice of Determination Concerning
    Collection Action(s) Under Section 6320 and/or 6330. The Office of Appeals
    denied relief on all of Goldberg’s claims raised in his Form 12153.
    Though it is not entirely clear, the Office of Appeals seems to have
    determined that Goldberg’s receipt of Letter 1058, “Final Notice of Intent to Levy
    and Notice of Your Right to a Hearing”, constituted a prior opportunity to
    challenge the underlying tax (both the underpayment and interest liability), and
    therefore section 6330(c)(2)(B) prohibited Goldberg from raising these challenges
    again in this CDP hearing.
    The Office of Appeals also rejected Goldberg’s argument that the May 2011
    Form 4549 constituted a binding contract. It stated that the “IRS has the authority
    to correct computational errors on a report”, citing Clark v. Commissioner, T.C.
    Memo. 1957-129, aff’d in part, rev’d in part, 
    266 F.2d 698
    (9th Cir. 1959). It
    - 154 -
    [*154] seems that the Office of Appeals determined that the report (i.e., the May
    2011 Form 4549) was not conclusive as to Goldberg’s liability for interest.
    The notice of determination briefly touched on Goldberg’s request for
    interest abatement, which was one of the claims made on the Form 843 (and the
    Form 12153). The notice of determination stated that Goldberg had “really filed
    an abatement of tax claim (as confirmed by reviewing the form). The interest-
    abatement unit confirmed that they closed the case because the abatement of
    interest was not at issue.” Though it is not entirely clear what the Office of
    Appeals meant by that statement, it seems to have denied Goldberg’s interest-
    abatement claim without considering the actual merits of the interest-abatement
    arguments Goldberg made on the Form 843 (and the Form 12153).
    After receiving the notice of determination, Goldberg spoke with a member
    of the IRS’s Taxpayer Advocate Service, who raised the possibility of Goldberg’s
    filing a petition in this Court. Goldberg did so on June 26, 2013, the last day of
    this period, Period 22. As discussed supra part I, pp. 27-28, we remanded this case
    to the Office of Appeals to determine whether Goldberg was entitled to interest
    abatement. As 
    explained supra
    part I, pp. 30-32, first the interest- abatement
    coordinator (O’Neil), then the Appeals officer (Keen), reviewed Goldberg’s
    entitlement to interest abatement for this period, Period 22.
    - 155 -
    [*155]       3.    Analysis and holding
    We uphold the IRS’s denial of interest abatement for this period, Period 22.
    The Office of Appeals denied interest abatement for this period because at the time
    both the interest-abatement coordinator and the Appeals officer examined the
    Goldbergs’ account transcript, it showed that their account balance was zero. The
    Goldbergs’ account transcript is in the record, and we see that it showed that as of
    August 1, 2011, their account balance was zero. Because the account balance
    showed that the Goldbergs owed no tax (it had a $0 balance), no interest was
    accruing for any period after August 1, 2011.62 Thus, they determined, there was
    no interest to abate. This conclusion was correct in the light of the information
    available to O’Neil and Keen at the time they drew their conclusions.
    At the time both the interest-abatement coordinator and the Appeals officer
    examined the Goldbergs’ IRS account transcript, their conclusions were correct.
    The IRS had erroneously credited the Goldbergs’ account, bringing their balance
    62
    Sec. 6404(e)(1) allows the IRS to abate assessed interest. The record does
    not show that interest was assessed during Period 22. The record shows that
    August 1, 2011 was the only date that interest had been assessed for the
    Goldbergs’ 2004 tax year. Period 22 spans August 24, 2011, to June 26, 2013.
    We need not determine whether interest was assessed for the interest that accrued
    during Period 22 because Goldberg would not be entitled to interest abatement for
    this period for reasons we explain infra.
    - 156 -
    [*156] down to zero. However, after this erroneous credit had been removed,
    interest again began to accrue on the positive balance.
    The Office of Appeals’ reasoning for denying interest abatement during this
    period relied on inaccurate facts. Because of that, Period 22 presents two issues
    that we must address: (1) whether a further remand to Appeals is necessary to
    determine Goldberg’s entitlement to interest abatement using the corrected
    account transcript and (2) if remand is unnecessary, whether Goldberg is entitled
    to interest abatement under section 6404(e)(1).
    a.    Whether remand is appropriate
    We will remand a case to the Office of Appeals for a supplemental hearing
    if remand would be “necessary or productive”. Lunsford v. Commissioner, 
    117 T.C. 189
    . If the taxpayer has already had a proper opportunity for a hearing and
    the record is sufficient to allow this Court to evaluate the merits of the claim, then
    remand is neither necessary nor productive. Id.; see also Rivas v. Commissioner,
    at *9-*12. We also do not remand where the IRS’s error is harmless. E.g.,
    Watchman v. Commissioner, T.C. Memo. 2012-113, slip op. at 15-16.
    An error is harmless “when it causes no prejudice or does not affect the
    ultimate determination in the case.”
    Id., slip op.
    at 15. An Appeals officer’s
    failure to consider an aspect of a taxpayer’s argument does not prejudice the
    - 157 -
    [*157] taxpayer if the argument would not have provided some basis for relief.
    Perkins v. Commissioner, 
    129 T.C. 69-71
    ; see also West v. Commissioner, T.C.
    Memo. 2010-250, slip op. at 22-24, aff’d mem., No. 11-1008 (1st Cir. Oct. 3,
    2011). Because such a failing is inconsequential, a harmless error “does not give
    rise to an abuse of discretion.” Watchman v. Commissioner, slip op. at 16.
    We decline to remand Goldberg’s claim for Period 22 to the Office of
    Appeals for further consideration. A remand is not necessary, nor would it be
    productive, because Goldberg has had a full opportunity for both the Office of
    Appeals and this Court to hear his claim, and we are able to decide the merits of
    the issue on the basis of the corrected information in the record.
    Furthermore, as we explain infra, Goldberg was not prejudiced by the IRS’s
    reliance on inaccurate information because Goldberg’s arguments for interest
    abatement for Period 22 would not have entitled him to relief under section
    6404(e)(1).63 Because the IRS’s mistake did not prejudice Goldberg, it was a
    harmless error, not an abuse of discretion.
    63
    Under either an abuse-of-discretion or a de novo standard of review, we
    uphold the Office of Appeals’ determination to deny interest abatement for Period
    22. The standard of review for this period does not affect our holding.
    - 158 -
    [*158]             b.     Whether Goldberg is entitled to interest abatement
    Goldberg is not entitled to interest abatement for the time between his
    mailing in his Form 843 and his filing a petition in this Court.
    Goldberg argued that abatement should be granted for this period, alleging
    there was a “delay in processing [his] claim” for interest abatement that was not
    resolved “until [his] court petition [was] filed”. We understand that statement to
    mean that Goldberg would have paid whatever interest was due once the IRS had
    issued him a determination on the interest-abatement claims in his Form 843,
    “Claim for Refund and Request for Abatement”. Framing this in the terms of
    section 6404(e)(1), Goldberg argues that the IRS’s delay in ruling on the substance
    of his Form 843 claim caused interest to accrue during Period 22. We disagree.
    The IRS did not cause him to delay paying the balance of the interest due.
    Though Goldberg seeks interest abatement from August 24, 2011, through
    June 26, 2013, he filed his claim for interest abatement on or about September 9,
    2011. Because there could not have been a delay in processing his Form 843
    before the IRS had even received it, we deny interest abatement for interest that
    accrued before the IRS received Goldberg’s Form 843. For different reasons,
    which we explain infra, we deny him interest abatement for the remainder of
    Period 22.
    - 159 -
    [*159] On brief, Goldberg argues that Bucaro v. Commissioner, T.C. Memo.
    2009-247, entitles him to relief during the period in which the IRS delayed
    processing his Form 843. In Bucaro, we granted interest abatement for the period
    between the date the taxpayer filed his Form 843 claim for interest abatement and
    the date an IRS employee was assigned to process the taxpayer’s claim.
    Id., slip op.
    at 31. We found that the record lacked any credible evidence to explain the
    “complete institutional silence” that occurred during the more than yearlong
    period between when the taxpayer filed his Form 843 and when the IRS finally
    acted on it.
    Id. The Bucaro
    fact pattern looks similar to some of the facts we have
    found here during Period 22. However, there is one dispositive distinction
    between Bucaro and Goldberg: Bucaro had paid all of the interest in dispute a few
    months before he filed his petition with this Court.
    Id. at 19;
    Petition, Bucaro v.
    Commissioner, T.C. Memo. 2009-247 (No. 17659-07). Goldberg did not and, as
    of the date of trial, had not remitted payment for the interest in dispute.
    The IRS may abate the portion of interest “attributable in whole or in
    part to” the IRS’s “unreasonable error or delay” (in performing a managerial or
    ministerial act). Sec. 6404(e)(1). We reiterate that “attributable to” means “due
    to, caused by, or generated by.” Lawinger v. Commissioner, 
    103 T.C. 435
    .
    Thus, abatement of a portion of interest under section 6404(e)(1) requires a
    - 160 -
    [*160] showing that the IRS has caused that portion of interest to accrue. Braun v.
    Commissioner, slip op. at 15; see also Palihnich v. Commissioner, T.C. Memo.
    2003-297, slip op. at 12.
    In general, interest on an underpayment for a tax year stops accruing when
    the taxpayer has fully paid the balance due for that year.64 See sec. 6601(a); see
    also Larkin v. Commissioner, T.C. Memo. 2014-195, at *18-*23, aff’d, 626 F.
    App’x 813 (11th Cir. 2015). The sooner a taxpayer pays his or her liability, the
    less interest accrues on that liability. Cf. sec. 6622(a). We have granted interest
    abatement to taxpayers in cases where the IRS had made an unreasonable error or
    delay that prevents the taxpayer from conclusively knowing the amount of liability
    due. E.g., Hancock v. Commissioner, T.C. Memo. 2012-31; Bucaro v.
    Commissioner, T.C. Memo. 2009-247. However, we have done so only when the
    taxpayer has “show[n] that * * * [he] would have paid his * * * tax liability earlier
    but for” the IRS’s unreasonable error or delay. Foote v. Commissioner, at *15;
    see, e.g., Hancock v. Commissioner, slip op. at 14-15; Bucaro v. Commissioner,
    slip op. at 12-15; Douponce v. Commissioner, T.C. Memo. 1999-398, slip op.
    at 6-7. If the taxpayer would not have paid the liability earlier, the IRS’s
    unreasonable error or delay could not have delayed payment, and thus could not
    64
    A third party might also pay the balance.
    - 161 -
    [*161] have caused “in whole or in part” the accrual of interest. See sec.
    6404(e)(1).
    For this period, Period 22, Goldberg essentially argues that the IRS’s delay
    in processing his Form 843 prevented him from knowing how much interest he
    owed, causing him to delay payment and thus causing further interest to accrue.
    Goldberg relies on Bucaro to argue that had the IRS conclusively determined his
    entitlement to interest abatement sooner, he would have known how much he
    owed. However, unlike the petitioner in Bucaro, Goldberg has not shown that he
    would have paid the interest accruing on his tax liability but for the IRS’s failure
    to process his Form 843. At trial, IRS counsel asked Goldberg whether he had the
    “financial means to pay” the approximately $17,000 in interest when he “received
    the bill” for it in August 2011.65 Goldberg testified: “I can’t answer that. I don’t
    know if at that point in my life I did or didn’t.” When IRS counsel asked other
    questions about Goldberg’s ability to pay the interest at the time, Goldberg’s
    testimony was also equivocal. Furthermore, the record does not contain any
    documentary evidence that Goldberg was able to pay the interest due at the time
    he submitted the Form 843.
    65
    
    See supra
    part III.II, p. 146 (Period 21), which discusses the August 1,
    2011 assessment and mailing of the CP 22 notice.
    - 162 -
    [*162] Goldberg has the burden of proof on all issues, see Rule 142(a), and he has
    failed to prove that he would have paid the interest due but for the IRS’s alleged
    unreasonable error or delay in processing his Form 843. Thus, the interest was not
    attributable to the IRS’s unreasonable error or delay in performing a managerial or
    ministerial act and is thus not abateable under section 6404(e)(1).
    The interest that accrued during Period 22 is not attributable to any action of
    the IRS. Therefore, Goldberg is not entitled to relief under section 6404(e)(1).
    IV.   Conclusion
    In conclusion, we sustain the notice of determination, as supplemented by
    the supplemental notice of determination, with the exception of Period 21, for
    which the IRS conceded Goldberg was entitled to interest abatement. Our
    determination to sustain the notice of determination, as supplemented, except for
    Period 21, includes a determination that the Office of Appeals did not abuse its
    discretion in denying interest abatement for Periods 1-20 and Period 22. For the
    sake of clarity, the following table details each period for which the Office of
    Appeals denied interest abatement and for which we sustain the denial.
    - 163 -
    [*163]            Date period
    Period number     begins           Date period ends      Number of days
    Period 1       9/12/2007               9/20/2007               9
    Period 2       9/20/2007               9/27/2007               8
    Period 3       12/1/2007               1/31/2008              62
    Period 4       1/31/2008               3/11/2008             41
    Period 5       3/11/2008               4/28/2008             49
    Period 6       7/18/2008               7/30/2008             13
    Period 7       8/8/2008                8/16/2008               9
    Period 8       8/27/2008               9/4/2008                9
    Period 9       9/4/2008                9/22/2008              19
    Period 10      9/23/2008               9/25/2008               3
    Period 11      9/29/2008              11/13/2008             46
    Period 12      5/29/2009               6/8/2009              11
    Period 13      6/10/2009               6/15/2009               6
    Period 14      6/20/2009               7/27/2009             38
    Period 15      7/27/2009               8/9/2010              379
    Period 16     11/15/2010               12/8/2010              24
    Period 17      12/8/2010                1/3/2011              27
    Period 18      1/7/2011                1/10/2011               4
    Period 19      1/13/2011               2/15/2011             34
    Period 20      3/29/2011               4/15/2011             18
    Period 22      8/24/2011               6/26/2013             673
    An appropriate decision will be
    entered.