Keller Tank Services II, Inc. v. Commissioner ( 2017 )


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  •                                                                                    FILED
    United States Court of Appeals
    PUBLISH                                 Tenth Circuit
    UNITED STATES COURT OF APPEALS                           April 20, 2017
    Elisabeth A. Shumaker
    FOR THE TENTH CIRCUIT                              Clerk of Court
    _________________________________
    KELLER TANK SERVICES II, INC.,
    Petitioner - Appellant,
    v.                                                           No. 16-9001
    COMMISSIONER OF INTERNAL
    REVENUE,
    Respondent - Appellee.
    _________________________________
    ORDER
    _________________________________
    Before HOLMES, MATHESON, and McHUGH, Circuit Judges.
    _________________________________
    This matter is before us on Appellee’s Motion to Amend Opinion to Clarify
    Authority of IRS Office of Appeals over Rescission of I.R.C. § 6707A Penalties. Upon
    careful consideration, the motion is granted. The court’s February 21, 2017 opinion is
    withdrawn and replaced by the attached revised opinion.
    Entered for the Court,
    ELISABETH A. SHUMAKER, Clerk
    by: Chris Wolpert
    Chief Deputy Clerk
    FILED
    United States Court of Appeals
    PUBLISH                              Tenth Circuit
    UNITED STATES COURT OF APPEALS                      February 21, 2017
    Elisabeth A. Shumaker
    FOR THE TENTH CIRCUIT
    Clerk of Court
    _________________________________
    KELLER TANK SERVICES II, INC.,
    Petitioner - Appellant,
    v.                                                          No. 16-9001
    COMMISSIONER OF INTERNAL
    REVENUE,
    Respondent - Appellee.
    _________________________________
    APPEAL FROM THE COMMISSIONER OF INTERNAL REVENUE
    (CIR No. 11611-14 L)
    _________________________________
    A. Lavar Taylor, A. Lavar Taylor Law Offices, Santa Ana, California (Jonathan T.
    Amitrano, A. Lavar Taylor Law Offices, Santa Ana, California; Allen J. White, Allen J.
    White & Associates, Downers Grove, Illinois; and William Wise, Wise & Stracks,
    Chicago, Illinois, with him on the briefs), appearing for Appellant.
    Jennifer M. Rubin, Attorney, Tax Division (Caroline D. Ciraolo, Principal Deputy
    Assistant Attorney General; Diana L. Erbsen, Deputy Assistant Attorney General; Gilbert
    S. Rothenberg, Attorney, Tax Division; and Michael J. Haungs, Attorney, Tax Division,
    with her on the brief), United States Department of Justice, Washington, DC, appearing
    for Appellee.
    _________________________________
    Before HOLMES, MATHESON, and McHUGH, Circuit Judges.
    _________________________________
    MATHESON, Circuit Judge.
    _________________________________
    In this appeal, we address whether a taxpayer may challenge a tax penalty in a
    Collection Due Process hearing (“CDP hearing”) after already having challenged the
    penalty in the Appeals Office of the Internal Revenue Service (“IRS”).
    Keller Tank Services II, Inc. (“Keller”), the taxpayer, participated in an employee
    benefit plan and took deductions for its contributions to the plan. The IRS notified Keller
    of (1) a tax penalty of $57,782 for failure to report its participation in the plan as a “listed
    transaction” on its 2007 tax return, and (2) an income tax deficiency and related penalties
    for improper deductions of payments to the plan. This case is about the $57,782 penalty
    and Keller’s efforts to challenge it.
    As more fully described below, Keller protested the tax penalty at the IRS Appeals
    Office. It then attempted to do so in a CDP hearing but was rebuffed because it already
    had challenged the penalty at the Appeals Office. Keller appealed the CDP decision to
    the Tax Court, which granted summary judgment to the Commissioner of Internal
    Revenue (“Commissioner”). Keller appeals that decision here. Exercising jurisdiction
    under 26 U.S.C. § 7482(a)(1), we affirm.
    I.   BACKGROUND
    To aid the reader, we provide definitions of various terms, set forth the pertinent
    statutes and regulation, and offer a brief overview of the relevant tax enforcement process
    and administrative structure. We then turn to the factual and procedural history of this
    case.
    -2-
    A. Terms, Statutes, and Regulation
    1. Key Terms
    The following terms are used throughout the opinion and first appear in the order
    presented here.1
     Commissioner: the Commissioner of Internal Revenue is nominated by the
    President and confirmed by the Senate, and has the duty to administer, manage,
    conduct, direct, and supervise the execution and application of internal revenue
    laws. Lawsuits by and against the IRS are conducted in the name of the
    Commissioner, and are litigated by counsel of the IRS.
     Liability: amount owed by a taxpayer under the tax laws. As used in this
    opinion, a liability may be a penalty or deficiency.
     Deficiency: the amount by which the tax value imposed by the IRS exceeds
    the amount reported by the taxpayer on its return. The IRS’s determination of
    a deficiency is a provisional determination. Accordingly, a notice of
    deficiency affords the taxpayer a right to prepayment judicial review by the
    Tax Court before the IRS assesses and collects the liability. The IRS cannot
    attempt to collect the deficiency until the notice of deficiency has been mailed
    to the taxpayer and the taxpayer has been given 90 days to file a petition in the
    Tax Court. 26 U.S.C. § 6213.
     Penalty: imposed on taxpayers by the IRS to encourage compliance with tax
    laws. Certain penalties are considered assessable, which means the IRS may
    assess them without providing an opportunity for prepayment judicial review
    by the Tax Court. The penalty provision relevant to this case is § 6707A,
    which imposes a penalty for failing to report transactions classified as
    “reportable,” including “listed” transactions. 26 U.S.C. § 6707A(b)(2). A
    § 6707A penalty may be imposed for failure to report regardless of whether a
    deficiency results. Internal Revenue Manual 4.32.4.1.1 ¶ 3.
     Reportable Transaction: a transaction that must be disclosed on a taxpayer’s
    return because the Secretary of Treasury (“Secretary”) has determined that type
    of transaction has potential for tax avoidance or evasion. The maximum
    penalty for failure to report a reportable transaction, other than a listed
    transaction, is $50,000 for a corporation. 26 U.S.C. § 6707A(b)-(c).
    1
    Unless otherwise specified, all definitions are from Michael I. Saltzman and
    Leslie Book, IRS Prac. & Proc. (2016).
    -3-
     Listed Transaction: a type of reportable transaction that is the same as, or
    substantially similar to, a transaction specifically identified by the Secretary as
    a tax avoidance transaction. The Secretary identifies listed transactions in
    notices or other published guidance. The maximum penalty for failing to
    report a listed transaction is $200,000 for a corporation. 26 U.S.C.
    § 6707A(b)-(c).
     Assessment: the formal recording and establishment of a taxpayer’s liability,
    fixing the amount owed by the taxpayer. The assessment is effectively a
    judgment and triggers the IRS’s ability to collect on the liability via lien or
    levy.
     Levy: after a liability has been assessed, certain procedural requirements have
    been met, and the taxpayer has neglected or refused to pay the assessed tax, the
    IRS may attach, or encumber, the taxpayer’s property to seize and sell it as “a
    prompt and convenient method for satisfying delinquent tax claims.” United
    States v. Nat’l Bank of Commerce, 
    472 U.S. 713
    , 736 (1985) (quotations
    omitted). This process is called a “levy.”
     Rescission Request: the taxpayer may request the Commissioner to rescind all
    or part of a penalty imposed under § 6707A for a non-listed reportable
    transaction if doing so would promote compliance with the tax laws and
    effective tax administration. The Commissioner, however, may not rescind a
    penalty for a listed transaction. No judicial review is available for the decision
    to grant or deny rescission. 26 U.S.C. § 6707A(d)(2).
     IRS Appeals Office: the administrative dispute resolution body of the IRS that
    resolves tax controversies without litigation. The 1998 IRS Restructuring and
    Reform Act emphasized that the Appeals Office must be an independent
    bureau of the IRS and be impartial to the government and taxpayer. See
    Robert v. United States, 
    364 F.3d 988
    , 990 (8th Cir. 2004).
     Collection Due Process (“CDP”) Hearing: the procedure created by the 1998
    IRS Restructuring and Reform Act to control overreaching in the IRS’s
    collection activities. When the IRS decides to collect a liability through a lien
    or levy, taxpayers first receive an opportunity to contest the collection through
    an administrative CDP hearing before a CDP hearing officer (an independent
    employee of the Appeals Office). The CDP hearing officer must have had no
    prior involvement with the taxpayer. Section 6330 outlines the CDP hearing
    procedures required before a levy may be made. 26 U.S.C. § 6330.
    -4-
     Tax Court: a specialized court established by Congress under Article I of the
    Constitution to conduct prepayment judicial review of deficiencies. The Tax
    Court also may review certain other administrative determinations by the IRS.
    See, e.g., 26 U.S.C. § 6330.
     Refund suit: a lawsuit brought by a taxpayer seeking a refund of a paid
    liability alleged to be unlawfully collected. To challenge the IRS’s assessment
    in a refund suit, the taxpayer must first pay the full amount of the tax liability
    and file a claim for refund with the IRS. If the IRS issues an adverse decision,
    the taxpayer may then institute a tax refund suit in either a federal district court
    or the U.S. Court of Federal Claims.
    2. Key Statutes and Regulation
    The following statutes and regulation are the primary legal materials
    applicable to this appeal.
    a. 26 U.S.C. § 6707A: Penalty for failure to include reportable transaction
    information with return
    (a) Imposition of penalty
    Any person who fails to include on any return or statement any information
    with respect to a reportable transaction which is required under section 6011 to
    be included with such return or statement shall pay a penalty in the amount
    determined under subsection (b).
    (b) Amount of penalty
    (1) In general
    Except as otherwise provided in this subsection, the amount of the
    penalty under subsection (a) with respect to any reportable transaction
    shall be 75 percent of the decrease in tax shown on the return as a result
    of such transaction (or which would have resulted from such transaction
    if such transaction were respected for Federal tax purposes).
    (2) Maximum penalty
    The amount of the penalty under subsection (a) with respect to any
    reportable transaction shall not exceed—
    (A) in the case of a listed transaction, $200,000 ($100,000 in the
    case of a natural person), or
    (B) in the case of any other reportable transaction, $50,000
    ($10,000 in the case of a natural person).
    (3) Minimum penalty
    The amount of the penalty under subsection (a) with respect to any
    -5-
    transaction shall not be less than $10,000 ($5,000 in the case of a
    natural person).
    (c) Definitions
    For purposes of this section:
    (1) Reportable transaction
    The term “reportable transaction” means any transaction with respect to
    which information is required to be included with a return or statement
    because, as determined under regulations prescribed under section 6011,
    such transaction is of a type which the Secretary determines as having a
    potential for tax avoidance or evasion.
    (2) Listed transaction
    The term “listed transaction” means a reportable transaction which is
    the same as, or substantially similar to, a transaction specifically
    identified by the Secretary as a tax avoidance transaction for purposes
    of section 6011.
    (d) Authority to rescind penalty
    (1) In general
    The Commissioner of Internal Revenue may rescind all or any portion
    of any penalty imposed by this section with respect to any violation if—
    (A) the violation is with respect to a reportable transaction other
    than a listed transaction, and
    (B) rescinding the penalty would promote compliance with the
    requirements of this title and effective tax administration.
    (2) No judicial appeal
    Notwithstanding any other provision of law, any determination under
    this subsection may not be reviewed in any judicial proceeding.
    b. 26 U.S.C. § 6330: Notice and opportunity for [a CDP] hearing before levy
     26 U.S.C. § 6330(c)(2)(B) (“¶ (c)(2)(B)”):
    (c) Matters considered at hearing
    In the case of any hearing conducted under this section—
    ****
    (2) Issues at hearing
    (A) In general
    The person may raise at the hearing any relevant issue
    relating to the unpaid tax or the proposed levy, including—
    (i) appropriate spousal defenses;
    (ii) challenges to the appropriateness of collection
    actions; and
    -6-
    (iii) offers of collection alternatives, which may
    include the posting of a bond, the substitution of other
    assets, an installment agreement, or an offer-in-
    compromise.
    (B) Underlying liability
    The person may also raise at the hearing challenges to the
    existence or amount of the underlying tax liability for any tax
    period if the person did not receive any statutory notice of
    deficiency for such tax liability or did not otherwise have an
    opportunity to dispute such tax liability.
     26 U.S.C. § 6330(c)(4)(A) (“¶ (c)(4)(A)”):
    (c) Matters considered at hearing
    In the case of any hearing conducted under this section—
    ****
    (4) Certain issues precluded
    An issue may not be raised at the hearing if—
    (A)(i) the issue was raised and considered at a previous
    hearing under section 6320 or in any other previous
    administrative or judicial proceeding; and
    (ii) the person seeking to raise the issue participated
    meaningfully in such hearing or proceeding; or
    (B) the issue meets the requirement of clause (i) or (ii) of
    section 6702(b)(2)(A).
     26 U.S.C. § 6330(d):
    (d) Proceeding after hearing
    (1) Petition for review by Tax Court
    The person may, within 30 days of a determination under this
    section, petition the Tax Court for review of such determination (and
    the Tax Court shall have jurisdiction with respect to such matter).
    ****
    (3) Jurisdiction retained at IRS Office of Appeals
    The Internal Revenue Service Office of Appeals shall retain
    jurisdiction with respect to any determination made under this
    section, including subsequent hearings requested by the person who
    requested the original hearing on issues regarding—
    (A) collection actions taken or proposed with respect to such
    determination; and
    -7-
    (B) after the person has exhausted all administrative
    remedies, a change in circumstances with respect to such
    person which affects such determination.
    c. 26 C.F.R. § 301.6320-1(“Treas. Reg. § 301.6320-1”): Notice and opportunity
    for [a CDP] hearing upon filing of notice of Federal tax lien
     Treas. Reg. § 301.6320-1(e)(3):
    (e) Matters considered at CDP hearing—(1) In general. . . . Appeals has the
    authority to determine the validity, sufficiency, and timeliness of any CDP
    Notice given by the IRS and of any request for a CDP hearing that is made
    by a taxpayer. . . . The taxpayer may raise any relevant issue relating to the
    unpaid tax at the hearing, including appropriate spousal defenses,
    challenges to the appropriateness of the [proposed levy], and offers of
    collection alternatives. The taxpayer also may raise challenges to the
    existence or amount of the underlying liability, including a liability
    reported on a self-filed return, for any tax period specified on the CDP
    Notice if the taxpayer did not receive a statutory notice of deficiency for
    that tax liability or did not otherwise have an opportunity to dispute the tax
    liability. Finally, the taxpayer may not raise an issue that was raised and
    considered at a previous CDP hearing under section 6330 or in any other
    previous administrative or judicial proceeding if the taxpayer participated
    meaningfully in such hearing or proceeding. Taxpayers will be expected to
    provide all relevant information requested by Appeals, including financial
    statements, for its consideration of the facts and issues involved in the
    hearing.
    ****
    (3) Questions and answers.
    ****
    Q–E2. When is a taxpayer entitled to challenge the existence
    or amount of the tax liability specified in the CDP Notice?
    A–E2. A taxpayer is entitled to challenge the existence or
    amount of the underlying liability for any tax period specified
    on the CDP Notice if the taxpayer did not receive a statutory
    notice of deficiency for such liability or did not otherwise
    have an opportunity to dispute such liability. Receipt of a
    statutory notice of deficiency for this purpose means receipt
    in time to petition the Tax Court for a redetermination of the
    deficiency determined in the notice of deficiency. An
    opportunity to dispute the underlying liability includes a prior
    opportunity for a conference with Appeals that was offered
    -8-
    either before or after the assessment of the liability. An
    opportunity for a conference with Appeals prior to the
    assessment of a tax subject to deficiency procedures is not a
    prior opportunity for this purpose.
    B. Legal and Administrative Background
    The Internal Revenue Code (“Code” or “IRC”) requires taxpayers to file returns in
    the manner prescribed by the IRS. 26 U.S.C. § 6011(a). The Code directs the
    Secretary—acting through the IRS—to determine, assess, and collect federal taxes. See
    
    id. §§ 6201(a),
    6301. Under this authority, the Secretary has established a procedure for
    the IRS to assess and collect penalties and deficiencies, and methods for the taxpayer to
    dispute these liabilities.
    1. Section 6707A Penalty and Administrative Procedure
    Section 6707A of the Code, titled “Penalty for Failure to Include Reportable
    Transaction Information with Return,” authorizes the imposition of a penalty on
    taxpayers who fail to disclose information on their tax returns regarding “reportable”
    transactions, including “listed” transactions. 
    Id. § 6707A.
    Penalties under § 6707A are not subject to the procedures the IRS has afforded for
    deficiencies because they do not depend upon a deficiency; they are imposed solely for
    the failure to disclose, even in cases involving an overpayment of tax. Smith v. Comm’r,
    
    133 T.C. 424
    , 428-29 (2009). Because § 6707A penalties are not subject to deficiency
    procedures, the taxpayer may not directly appeal a penalty to the Tax Court. See
    Bartman v. Comm’r, 
    446 F.3d 785
    , 787 (8th Cir. 2006) (stating “[a] notice of deficiency
    issued by the IRS pursuant to § 6212 is the taxpayer's jurisdictional ‘ticket to the Tax
    -9-
    Court.’” (citations omitted)); Spector v. Comm’r, 
    790 F.2d 51
    , 52 (8th Cir. 1986) (citing
    Laing v. United States, 
    423 U.S. 161
    , 165 n.4 (1976)) (stating “the determination of a
    deficiency and the issuance of a notice of deficiency is an absolute precondition to tax
    court jurisdiction”).
    Thus, contesting a § 6707A penalty takes a different course. Once an IRS
    examiner proposes and receives approval from the IRS Territory Manager to impose a
    penalty for failing to report a reportable transaction, the examiner issues a “30-day
    Letter” before formally assessing the penalty. Internal Revenue Manual at 4.32.4.4. The
    taxpayer has 30 days to agree to or protest the penalty to the Appeals Office after
    receiving the “30-day Letter.” 
    Id. In response
    to the taxpayer’s protest, the IRS offers
    the taxpayer a pre-assessment review of the proposed § 6707A penalty by an IRS
    Appeals Officer “[i]f possible.” See 
    id. at 4.32.4.6.
    If a pre-assessment review is not
    possible, the taxpayer is offered a post-assessment review. 
    Id. The Appeals
    Officer may
    decide to abate or approve collection of the penalty. 
    Id. at 4.32.4.8,
    4.32.4.9.
    2. Collection Due Process (“CDP”) Hearings
    Once the IRS decides to levy to collect a penalty, it must notify the taxpayer in
    writing of the right to a hearing under § 6330(a)(1), called a CDP hearing. Congress
    created the CDP process as part of the 1998 IRS Restructuring and Reform Act, a
    “Taxpayer Bill of Rights” aimed to curb abuse of taxpayers. See Dalton v. Comm’r, 
    682 F.3d 149
    , 154 (1st Cir. 2012); Tucker v. Comm’r, 
    676 F.3d 1129
    , 1131 (D.C. Cir. 2012).
    a. The 1998 IRS Restructuring and Reform Act and the CDP Process
    - 10 -
    Before 1998, the IRS could reach a taxpayer’s assets by lien or levy without
    providing the taxpayer any process before the amount owed by the taxpayer was assessed
    and collected. 
    Dalton, 682 F.3d at 154
    . Congress created the CDP process to afford
    taxpayers a pre-deprivation opportunity to contest the lien or levy before the IRS
    proceeded with collection. 
    Id. at 154-55.
    At the CDP hearing, the taxpayer may
    challenge the propriety of a pending lien or levy, verify that collection is appropriate, and
    offer alternatives to collection. 
    Tucker, 676 F.3d at 1131
    .
    CDP hearings take place in the Appeals Office. Id.; Gyorgy v. Comm’r, 
    779 F.3d 466
    , 472 (7th Cir. 2015). The Appeals Officer presiding over the hearing represents the
    IRS and must have had no prior involvement with the liability at issue. 
    Tucker, 676 F.3d at 1131
    . CDP proceedings “are informal and may be conducted via correspondence, over
    the phone or face to face.” Living Care Alts. of Utica, Inc. v. United States, 
    411 F.3d 621
    , 624 (6th Cir. 2005). No transcript, recording, or other direct documentation of the
    proceeding is required. 
    Id. At the
    hearing, the Appeals Officer must do three things:
    1) conduct a verification that the IRS has met all legal requirements and fulfilled
    its procedural obligations to move forward with the lien or levy, 2) consider
    defenses and collection alternatives proffered by the taxpayer and [] 3) make a
    determination that the “proposed collection action balances the need for the
    efficient collection of taxes with the legitimate concern of the person that any
    collection action be no more intrusive than necessary.”
    
    Id. at 624-25
    (emphasis omitted) (quoting 26 U.S.C. § 6330(c)(3)).
    b. Matters Raised at the CDP Hearing
    - 11 -
    The 1998 IRS Restructuring and Reform Act lists the issues the taxpayer may
    raise at the CDP hearing. The taxpayer may challenge its underlying tax “liability” only
    if it “did not receive any statutory notice of deficiency for such tax liability or did not
    otherwise have an opportunity to dispute such tax liability.” 26 U.S.C. § 6330(c)(2)(B)
    (“¶ (c)(2)(B)”). Notably, the taxpayer need only have received an opportunity to dispute
    its tax liability. Whether it took advantage of that opportunity is irrelevant. Thus, a
    taxpayer is precluded from challenging liability at a CDP hearing when the taxpayer was
    afforded, but failed to take advantage of, a prior opportunity to dispute the liability. See,
    e.g., Chandler v. Comm’r, 327 F. App’x 763, 766 (10th Cir. 2009) (unpublished),2 Abu-
    Awad v. United States, 
    294 F. Supp. 2d 879
    , 887-88 (S.D. Tex. 2003), Pelliccio v. United
    States, 
    253 F. Supp. 2d 258
    , 261-62 (D. Conn. 2003).
    The taxpayer may raise any other relevant “issue” relating to the unpaid tax—
    including, but not limited to, challenges to the appropriateness of collection actions, and
    alternative collection options—so long as the issue was not raised and considered in a
    prior administrative or judicial proceeding where the taxpayer meaningfully participated.
    26 U.S.C. § 6330(c)(4)(A) (“¶ (c)(4)(A)”).
    c. Appealing the CDP Hearing’s Findings and Conclusions
    After the CDP hearing, the Appeals Office decides whether it is reasonable to
    proceed with the intended collection action and issues a notice of determination
    2
    Although not precedential, we find the reasoning of the unpublished cases
    cited in this opinion instructive. See 10th Cir. R. 32.1 (“Unpublished decisions are
    not precedential, but may be cited for their persuasive value.”); see also Fed. R. App.
    P. 32.1.
    - 12 -
    containing its findings and conclusions. 
    Dalton, 682 F.3d at 155
    ; 
    Gyorgy, 779 F.3d at 472
    (citing Treas. Reg. § 301.6330–1(e), Q & A–E8).
    A taxpayer who is dissatisfied with the findings or conclusions of the CDP hearing
    can appeal the determination to the Tax Court. 
    Gyorgy, 779 F.3d at 472
    (citing 26 U.S.C.
    § 6330(d)(1)). The Tax Court may review a § 6707A penalty when it is appealed from a
    CDP proceeding under § 6330(d). Yari v. Comm’r, 
    143 T.C. 157
    , 162 (2014).
    When the Tax Court receives an appeal from the CDP hearing, however, its
    review is limited to issues that were properly raised during the CDP hearing. See Goza v.
    Comm’r, 
    114 T.C. 176
    , 182-83 (2000); Perkins v. Comm’r, 
    129 T.C. 58
    , 67 (2007);
    Konkel v. Comm’r, 
    2000 WL 1819417
    , at *3 (M.D. Fla. Nov. 6, 2000); see also Treas.
    Reg. § 301.6330–1(f), Q & A–F3. Because liability challenges precluded by ¶ (c)(2)(B)
    and issues precluded by ¶ (c)(4)(A) cannot be heard at a CDP hearing, the taxpayer may
    not present them to the Tax Court on appeal from the CDP hearing. See 
    Goza, 114 T.C. at 182-83
    . If the taxpayer still wishes to contest those issues, it must instead pay the
    asserted liability and file a refund suit in federal district court. See Gorospe v. Comm’r,
    
    451 F.3d 966
    , 968 (9th Cir. 2006).
    3. Tax Court
    Congress established the Tax Court, an Article I court within the Executive
    Branch, Samuels, Kramer & Co. v. Comm’r, 
    930 F.2d 975
    , 991 (2d Cir. 1991), to give
    taxpayers a method to challenge IRS liability assessments without first having to pay an
    alleged liability. Without this forum, the taxpayer’s only alternative would be to pay the
    - 13 -
    asserted liability and initiate a refund suit in federal district court. 
    Bartman, 446 F.3d at 787
    .
    The Tax Court’s jurisdiction is limited and is generally conferred by § 7442, but
    other specific grants are interspersed throughout the Code. Internal Revenue Manual
    35.1.1.1. Specifically, § 6213(a) confers jurisdiction on the Tax Court to redetermine
    deficiencies and § 6330(d) confers jurisdiction to review penalties challenged at a CDP
    hearing. As noted above, the Tax Court may only review issues that were properly
    before the CDP proceeding.
    Because CDP hearings typically produce a “scant record,” the Tax Court generally
    conducts a deferential review of CDP determinations. See Olsen v. United States, 
    414 F.3d 144
    , 150 (1st Cir. 2005). If the underlying tax liability was properly at issue in the
    CDP hearing, the Tax Court reviews that issue de novo. Tucker v. Comm’r, 
    135 T.C. 114
    , 139 (2010). But the Tax Court reviews all other CDP determinations for an abuse of
    discretion. 
    Id. The Tax
    Court’s decision is subject to review in the appropriate circuit court of
    appeals. See 26 U.S.C. § 7482(a)(1).
    C. Factual and Procedural History
    Keller participated in an employee benefit plan called the Sterling Benefit Plan
    (“Plan”), but did not report its participation on its tax return. The IRS alleges Keller’s
    failure to report violated § 6707A. The IRS also claims Keller took improper deductions
    on its income tax returns related to its participation in the Plan, resulting in a deficiency.
    As a result, Keller has faced two parallel proceedings in which the IRS has sought: (1) a
    - 14 -
    penalty under § 6707A for Keller’s failure to report its participation in the Plan,3 which
    the IRS considers a listed transaction (“penalty proceeding”); and (2) the income tax
    deficiency from and resulting penalty for Keller’s alleged improper deduction of
    payments to the Plan (“deficiency proceeding”).4 This case concerns the first penalty
    proceeding and Keller’s efforts to challenge its liability for the § 6707A penalty. We
    outline the relevant factual and procedural history below.
    1. Section 6707A Penalty and Appeals Office Administrative Proceedings
    The Commissioner proposed a $57,781.50 penalty against Keller under
    § 6707A for the 2007 tax year for Keller’s failure to disclose its participation in a
    listed transaction. Keller filed a protest with the Appeals Office to seek rescission of
    the penalty under § 6707A(d). On June 20, 2013, the Appeals Officer, Ms. Espinoza,
    held a telephone conference with Keller. Keller sent no materials beyond its protest
    to Ms. Espinoza for consideration before the conference but faxed three forms during
    the conference. At the conference, Ms. Espinoza heard Keller’s liability arguments,
    concluded Keller’s participation in the Plan was a “listed transaction,” and decided
    the penalty should be sustained. She sent a fax to Keller stating, “If taxpayer
    3
    As noted above, § 6707A penalties do not depend on an underlying
    deficiency.
    4
    The asserted penalties fall under § 6662(a) (“Imposition of Accuracy-Related
    Penalty on Underpayments”) and § 6662A (“Imposition of Accuracy-Related Penalty
    on Understatements with Respect to Reportable Transactions”). When determining
    penalties for deficiencies stemming from reportable transactions, including listed
    transactions, under § 6662A, the terms “reportable transaction” and “listed
    transaction” have the respective meanings given to such terms by § 6707A(c). 26
    U.S.C. § 6662A(d).
    - 15 -
    disagrees with the penalty and/or Appeals doesn’t hear from [Keller] by 7/9/2013,
    Appeals will process the case for closure.” J. App. at 35. Because the Appeals
    Office did not hear from Keller by July 9, 2013, it sustained the penalty and closed
    the case.
    2. CDP Hearing
    The IRS sent Keller a final notice of its intent to levy and of Keller’s right to a
    CDP hearing under § 6330. The letter stated that Keller must pay the assessed
    penalty, make payment arrangements, or appeal the levy by requesting a CDP
    hearing. Keller requested a CDP hearing, arguing the penalty was assessed “without
    the opportunity to protest the determination of the underlying transaction . . . [to be] a
    listed transaction.” J. App. at 45. Keller did not seek any collection alternatives or
    propose payment arrangements.
    A CDP Officer, Elizabeth DeAngelis, granted Keller’s request for a hearing
    and sent a letter scheduling a telephone conference. Ms. DeAngelis explained that
    the call would provide an opportunity to discuss the reasons Keller disagreed with the
    collection action or alternatives to the collection action. She explained that she must
    consider any legitimate issues Keller wished to discuss. But, tracking the language
    of ¶ (c)(2)(B), the letter stated: “You are not able to dispute the [underlying tax]
    liability in your CDP hearing because: Our records show you had a prior opportunity
    to dispute the penalty when you had a 6707A Appeals hearing for this tax period.” J.
    App. at 47. The letter also outlined how Keller could raise the issue of alternative
    collection methods at the CDP hearing and said that if Keller did not agree with the
    - 16 -
    CDP’s determination, “[it] may appeal the case to the United States Tax Court.” J.
    App. at 47.
    Keller participated in a phone conference with Ms. DeAngelis on March 18,
    2014. Keller attempted to contest its tax liability, but Ms. DeAngelis informed
    Keller’s counsel that Keller was precluded from challenging its liability because Ms.
    Espinoza had reviewed and sustained liability at the Appeals Office hearing. Keller
    raised no other issues during the hearing. Ms. DeAngelis sustained the penalty. The
    IRS sent Keller a Notice of Determination, which specified that Keller’s only
    arguments at the CDP hearing attempted to dispute its liability for the penalty,
    “however, you are unable to raise the liability within this hearing since you had a
    prior opportunity to dispute the liability when you had the IRC 6707A Appeals
    hearing for this same tax period. You raised no other issues.” J. App. at 52-53, 55.
    3. Tax Court
    Keller filed a petition with the Tax Court to challenge its liability for the
    penalty.5 The Commissioner filed a motion for summary judgment, arguing that
    Keller was precluded from contesting its liability for the penalty in its CDP hearing
    under ¶ (c)(2)(B) because of its previous opportunity to challenge liability at the
    Appeals Office hearing. After the Tax Court allowed the parties to supplement their
    5
    In its petition to the Tax Court, Keller also argued that § 6707(d)(2), which
    precludes judicial review of the Commissioner’s determination to rescind a penalty,
    is unconstitutional as a deprivation of due process. Keller raised this argument again
    in its Objection to the Commissioner’s Motion for Summary Judgment. The Tax
    Court noted the argument in its decision, but did not address its merits. Keller has
    not raised this argument on appeal.
    - 17 -
    filings, the Commissioner amended its motion for summary judgment to challenge
    Keller’s ability to challenge its liability under both ¶ (c)(2)(B) and ¶ (c)(4)(A).
    The Tax Court granted summary judgment to the Commissioner on June 16,
    2015. It determined that ¶ (c)(2)(B) precluded Keller from challenging its underlying
    liability because Keller was afforded a prior opportunity to dispute its liability in its
    hearing before the Appeals Office.6 The Tax Court further held that Treas. Reg.
    § 301.6320-1(e)(3) is a reasonable interpretation of ¶ (c)(2)(B) and applies to Keller
    based on Lewis v. Commissioner, 
    128 T.C. 48
    (2007). Because Keller did not raise
    any non-liability challenges, the Tax Court sustained the levy.7 Keller filed two
    motions for reconsideration, which the Tax Court denied.
    Keller timely appealed the Tax Court’s June 16, 2015 order to this court.
    6
    As noted above, ¶ (c)(2)(B) precludes liability challenges at the CDP hearing
    when the taxpayer had a prior opportunity to dispute liability. See supra, note 4.
    Although the taxpayer need not have taken advantage of that opportunity to be
    precluded from re-litigating its liability before the CDP hearing, we note, as the Tax
    Court did, that Keller availed itself of that opportunity and contested its penalty
    liability before Ms. Espinoza.
    7
    The Tax Court also distinguished Keller’s case from Yari v. Comm’r of
    Internal Revenue, 
    143 T.C. 157
    (2014). In Yari, the taxpayer’s previous Appeals
    Office consideration of its liability was not considered a “prior opportunity” to
    challenge its liability under ¶ (c)(2)(B) because an amendment to § 6707A, which
    established the proper method for computing penalties, intervened after the
    administrative hearing and before the Tax Court hearing. Without any intervening
    change to the statute giving rise to Keller’s liability in this case, the Tax Court held
    the Appeals Office had considered Keller’s liability before the CDP hearing, and
    Keller therefore had a prior opportunity to challenge the existence or the amount of
    the underlying liability, as required by ¶ (c)(2)(B).
    - 18 -
    II. DISCUSSION
    The Commissioner argues that Keller’s appeal is moot because Keller is
    collaterally estopped from challenging its liability. Keller argues that Treas. Reg.
    § 301.6320-1(e)(3) unreasonably interprets ¶ (c)(2)(B) to preclude liability
    challenges at the CDP hearing—and ultimately before the Tax Court—when the
    taxpayer had a prior opportunity to dispute its liability before the Appeals Office.
    We disagree with the Commissioner’s mootness arguments and with Keller’s
    arguments regarding the scope of the CDP hearing and affirm the Tax Court’s grant
    of summary judgment.
    A. Mootness and Collateral Estoppel
    The Commissioner’s mootness argument, as more fully explained below, stems
    from Keller’s stipulation to be bound in its deficiency proceeding by the Tax Court’s
    decision in a related case called Our Country Home Enterprises Inc., et al. v.
    Commissioner, 
    145 T.C. 1
    (2015). In Our Country Home, the Tax Court addressed
    another taxpayer’s participation in the same Sterling Benefit Plan and determined
    that participation in the Plan was a listed transaction. Based on Keller’s stipulation,
    the Commissioner contends that the Tax Court’s decision in Our Country Home that
    participation in the Plan was a listed transaction resolved all of Keller’s issues in this
    appeal and that Keller is thereby collaterally estopped from challenging its liability,
    mooting this case. We disagree for three reasons: (1) The Commissioner’s collateral
    estoppel argument concerns the merits of Keller’s arguments, not our jurisdiction;
    (2) Keller’s stipulation is binding only in Keller’s deficiency proceeding, not the
    - 19 -
    § 6707A penalty proceeding at issue in this appeal; and (3) even if Keller’s
    participation in the Plan is a listed transaction, Keller contests other issues related to
    this appeal.
    1. Additional Procedural Background
    In the second parallel proceeding mentioned above—the deficiency
    proceeding—the Commissioner issued a notice of deficiency to Keller for its alleged
    improper deductions based on payments to the Plan between 2006-2008 and assessed
    penalties for that deficiency under § 6662(a) and § 6662A. Keller stipulated with the
    IRS that its liability for any deficiency based on improper income deductions for the
    tax years 2006, 2007, and 2008 would be resolved “on the same basis that similar
    issues are resolved by the final decision . . . of Our Country Home.” Supp. App. at
    16.
    On July 13, 2015, the Tax Court published its decision in Our Country Home,
    concluding that participation in the Plan was a listed transaction, any deductions
    taken for payments to the Plan resulted in a deficiency, and this deficiency was
    subject to a penalty under § 6662A. The Tax Court entered its final order on
    February 8, 2016.
    2. Additional Legal Background
    a. Mootness
    The “[c]onstitutional mootness doctrine is grounded in the Article III requirement
    that federal courts may only decide actual ongoing cases or controversies.” Prier v.
    Steed, 
    456 F.3d 1209
    , 1212 (10th Cir. 2006) (citations and quotations omitted); see Lewis
    - 20 -
    v. Cont’l Bank Corp., 
    494 U.S. 472
    , 477 (1990). This court lacks subject matter
    jurisdiction if a case is moot. Brown v. Buhman, 
    822 F.3d 1151
    , 1165 (10th Cir. 2016).
    The parties must continue to have a “personal stake in the outcome” of the lawsuit at all
    stages of the litigation so the question decided affects the rights of the litigants in the case
    before the court. 
    Id. (citations and
    quotations omitted). The question is whether granting
    relief for the issues before the court “will have some effect in the real world.” 
    Id. at 1165-66
    (citations and quotations omitted).
    A case may become moot while pending, including on appeal. United States v.
    De Vaughn, 
    694 F.3d 1141
    , 1157 (10th Cir. 2012) (quoting Church of Scientology v.
    United States, 
    506 U.S. 9
    , 12 (1992)). An “actual controversy must be extant at all stages
    of review, not merely at the time the complaint is filed . . . . If an intervening
    circumstance deprives the plaintiff of a personal stake in the outcome of the lawsuit, at
    any point during litigation, the action can no longer proceed and must be dismissed as
    moot.” 
    Brown, 822 F.3d at 1165
    (citations and quotations omitted). ‘“Put another way, a
    case becomes moot when a plaintiff no longer suffers actual injury that can be redressed
    by a favorable judicial decision.”’ 
    Id. at 1166
    (quoting Ind v. Colo. Dep’t of Corr., 
    801 F.3d 1209
    , 1213 (10th Cir. 2015)). When a case is on appeal,
    [I]t is proper for a party to provide additional facts when that party has an
    objectively reasonable, good faith argument that subsequent events have
    rendered the controversy moot. Indeed, we depend on the parties for such
    information, and it is axiomatic that subsequent events will not be reflected
    in the [lower] court record.
    - 21 -
    See Morganroth & Morganroth v. DeLorean, 
    213 F.3d 1301
    , 1309 (10th Cir. 2000),
    overruled on other grounds by TW Telecom Holdings, Inc. v. Carolina Internet Ltd., 
    661 F.3d 495
    (10th Cir. 2011).
    We review mootness de novo as a legal question. 
    Brown, 822 F.3d at 1168
    .
    b. Collateral Estoppel
    Collateral estoppel, or issue preclusion, concerns the merits of a case. It is an
    affirmative defense that bars the re-litigation of an issue of law or fact after it is
    determined by a valid, final judgment. Stan Lee Media, Inc. v. Walt Disney Co., 
    774 F.3d 1292
    , 1297 (10th Cir. 2014).
    The party invoking collateral estoppel must prove four elements: (1) the issue
    previously decided is identical to the present one; (2) the prior action was finally
    adjudicated on the merits; (3) the party against whom the doctrine is invoked was a party
    or in privity with a party to the previous adjudication; and (4) the party against whom the
    doctrine is raised had a full and fair opportunity to litigate the issue in the previous
    adjudication. 
    Id. Regarding the
    third element, the Supreme Court generally holds that
    collateral estoppel does not apply to nonparties in the prior action. Taylor v. Sturgell, 
    553 U.S. 880
    , 893 (2008). But “the [general] rule against nonparty preclusion is subject to
    exceptions,” including that “[a] person who agrees to be bound by the determination of
    issues in an action between others is bound in accordance with the [agreement’s] terms.”
    
    Id. (quoting 1
    Restatement (Second) of Judgments § 40, p. 390 (1980)). The litigated
    issue must also be “essential to the judgment.” Stan Lee 
    Media, 774 F.3d at 1297
    (quoting Arizona v. California, 
    530 U.S. 392
    , 414 (2000)).
    - 22 -
    3. Analysis
    This case is not moot for three reasons.
    First, the Commissioner’s attempt to base mootness on collateral estoppel is
    misplaced. Unlike mootness, an Article III jurisdictional bar, collateral estoppel is an
    affirmative defense. See United States v. Simons, 86 F. App’x 377, 380 (10th Cir. Jan.
    22, 2004) (unpublished) (citing Kenmen Eng’g v. City of Union, 
    314 F.3d 468
    , 479 (10th
    Cir. 2002)) (“the[] invocation of . . . collateral estoppel to support [a] position on the
    merits does not introduce any jurisdictional element into the case; these are mere
    affirmative defenses.”)); see also Fed. R. Civ. P. 8(c) (listing res judicata and estoppel as
    affirmative defenses). When a collateral estoppel defense defeats a claim, it does so on
    the merits, not by displacing jurisdiction. The Sixth Circuit’s explanation of the
    interaction between the doctrines of mootness and collateral estoppel is instructive:
    [T]he possibility that a party is collaterally estopped from pursuing a cause
    of action does not entail that that cause of action is moot. . . . The doctrine
    of mootness . . . in no way depends on the merits of the plaintiff’s
    contention . . . . Stated differently, the court assumes that the plaintiff will
    receive the relief that he requests in this litigation, and then proceeds to
    determine whether there is a substantial likelihood that that relief will
    redress his asserted injury.
    Smith v. SEC, 
    129 F.3d 356
    , 363-64 (6th Cir. 1997) (quotations omitted). The
    Commissioner cites no authority to the contrary.
    Second, Keller’s stipulation was limited to its deficiency proceeding and did not
    cover its § 6707A penalty proceeding, which is the only proceeding pertinent to this
    appeal. Applying collateral estoppel to a nonparty on the basis of its agreement to be
    bound by an action between others is limited to “the [agreement’s] terms,” Taylor, 553
    - 23 -
    U.S. at 893. The terms of Keller’s stipulation in the deficiency proceeding do not extend
    to its liability in the penalty proceeding.
    Third, even if the decision in Our Country Home were to collaterally estop Keller
    from challenging that its participation in the Plan constituted a listed transaction, other
    issues remain that the outcome of this appeal could affect. The Commissioner argues that
    if Keller’s participation in the Plan is a listed transaction, this appeal is moot because
    Keller would be “collaterally estopped from challenging its liability for the reporting
    penalty on remand.” Aplee. Br. at 25.8 But Keller’s appeal contests the scope of the
    CDP hearing, not the merits of its liability challenge. And the Commissioner’s argument
    overlooks that Keller seeks to contest at the CDP hearing not only whether a penalty
    should be imposed but also its proper calculation under § 6707A. Aplt. Br. at 8 (“Among
    the issues considered by the Appeals Officer in this initial administrative appeal was
    whether the IRS erred in computing the amount of the penalty for the year 2007 . . . .
    Keller contended (and still contends) that any penalty assessed under § 6707A for the
    2007 tax year should be [calculated differently.]”). The Our Country Homes stipulation
    does not reach the calculation issue.
    8
    We question whether this appeal is the proper forum for the Commissioner to
    raise a collateral estoppel argument. At the CDP, Keller would challenge whether it
    should be subject to a penalty under § 6707A and how any such penalty should be
    calculated. These issues are not before us on this appeal, which is limited to determining
    whether Keller should be able to present those challenges at the CDP hearing. The
    Commissioner argues that the Tax Court’s decision in Our Country Home establishes by
    collateral estoppel that Keller’s participation in the Plan is a listed transaction and that the
    penalty therefore cannot ultimately be rescinded. But that issue is not before us. The
    collateral estoppel argument seems more appropriate for the CDP hearing or the Tax
    Court.
    - 24 -
    For the reasons stated, this case is not moot.
    B. Keller’s Liability Challenges
    Keller argues that ¶ (c)(2)(B) should not preclude liability challenges in a CDP
    hearing or the Tax Court when the taxpayer’s prior opportunity to dispute its liability
    arose, as it did here, in an administrative setting.9 Keller contends that ¶ (c)(2)(B)’s
    interpretive regulation, Treas. Reg. § 301.6330-1, which specifies that a conference
    with the Appeals Office is a prior opportunity under ¶ (c)(2)(B), is an unreasonable
    interpretation of ¶ (c)(2)(B).10 We disagree. The Tax Court properly held Keller
    was precluded from challenging its liability at the CDP hearing under ¶ (c)(2)(B).
    1. Standard of Review
    “We review tax court decisions ‘in the same manner and to the same extent as
    decisions of the district courts in civil actions tried without a jury.’” Katz v. Comm’r,
    
    335 F.3d 1121
    , 1125-26 (10th Cir. 2003) (quoting Kurzet v. Comm’r, 
    222 F.3d 830
    ,
    833 (10th Cir. 2000); 26 U.S.C. § 7482(a)(1)). Thus, like our review of a district
    court’s grant of summary judgment, we review the Tax Court’s grant of summary
    9
    Because the Tax Court’s decision was based on ¶ (c)(2)(B) and we conclude
    Keller was precluded from raising its liability challenges at the CDP hearing under
    that paragraph, we need not reach whether Keller was similarly precluded from doing
    so under ¶ (c)(4)(A).
    10
    Keller also proposes a new interpretation of ¶ (c)(2)(B): unless the taxpayer
    received a notice of deficiency, or a functional equivalent, the taxpayer may
    challenge the merits of the underlying liability in a CDP case. Because we conclude
    Treas. Reg. § 301.6330-1 reasonably interprets ¶ (c)(2)(B), we reject Keller’s
    proposed, alternative interpretation.
    - 25 -
    judgment de novo. Scanlon White, Inc. v. Comm’r, 
    472 F.3d 1173
    , 1174 (10th Cir.
    2006).
    2. Additional Legal Background
    This section outlines the legal framework for analyzing treasury regulations,
    highlights the relevant portions of ¶ (c)(2)(B) and Treas. Reg. § 301.6330-1, and
    summarizes the Tax Court’s analysis of Treas. Reg. § 301.6330-1 in Lewis v.
    Commissioner.
    a. Chevron deference
    We defer to an agency’s regulation that reasonably interprets an ambiguous
    statute. Chevron, U.S.A., Inc. v. Nat’l Res. Def. Council, Inc., 
    467 U.S. 837
    , 841-44
    (1984). “[C]onsiderable weight should be accorded to an executive department’s
    construction of a statutory scheme it is entrusted to administer.” 
    Id. at 844;
    see also
    Hydro Res., Inc. v. EPA, 
    608 F.3d 1131
    , 1145-46 (10th Cir. 2010) (en banc)
    (“[C]ourts afford considerable deference to agencies interpreting ambiguities in
    statutes that Congress has delegated to their care, including statutory ambiguities
    affecting the agency’s jurisdiction.” (citations omitted)).
    This deference applies to Treasury regulations. See Mayo Found. for Med.
    Educ. & Research v. United States, 
    562 U.S. 44
    , 55 (2011) (clarifying that Chevron
    applies “with full force in the tax context”). Here, the Secretary promulgated Treas.
    Reg. § 301.6330-1 pursuant to express general authority under 26 U.S.C. § 7805(a)
    after notice and comment. 
    Id. § 7805(a)
    (“Secretary shall prescribe all needful rules
    and regulations for the enforcement of this title, including all rules and regulations as
    - 26 -
    may be necessary by reason of any alteration of law in relation to internal revenue.”).
    It follows that Treas. Reg. § 301.6330-1 is entitled to Chevron deference unless it is
    “arbitrary or capricious in substance, or manifestly contrary to the statute.” Mayo
    
    Found., 562 U.S. at 53
    (quotations omitted).
    The Chevron-deference analysis proceeds in two steps. Zen Magnets, LLC v.
    Consumer Prod. Safety Comm’n, 
    841 F.3d 1141
    , 1160 (10th Cir. 2016). First,
    “[w]hen Congress has spoken to the precise question at issue, we must give effect to
    the express intent of Congress.” 
    Id. (citations and
    quotations omitted). Second, “[i]f
    the statute is silent or ambiguous, however, we defer to the agency's interpretation, if
    it is a permissible one.” 
    Id. (quotations omitted);
    see also Sierra Club, Inc. v.
    Bostick, 
    787 F.3d 1043
    , 1056-57 (10th Cir. 2015).
    In the first step, we employ the “traditional tools of statutory construction” to
    determine whether the intent of Congress is clear from the statutory text and
    “whether the [statutory] language . . . has a plain and unambiguous meaning with
    regard to the particular dispute.” INS v. Cardoza-Fonseca, 
    480 U.S. 421
    , 446
    (1987); 
    Chevron, 467 U.S. at 842-43
    ; Robinson v. Shell Oil Co., 
    519 U.S. 337
    , 340
    (1997). The “plainness or ambiguity of statutory language is determined by reference
    to the language itself, the specific context in which that language is used, and the
    broader context of the statute as a whole.” 
    Robinson, 519 U.S. at 341
    . If the statute
    is not ambiguous, our inquiry ends there. 
    Id. at 340.
    But if the statute is “capable of
    being understood by reasonably well-informed persons in two or more different
    - 27 -
    senses,” we proceed to the second step of Chevron. McGraw v. Barnhart, 
    450 F.3d 493
    , 498 (10th Cir. 2006) (quotations omitted).
    In the second step, if the statute is silent or ambiguous on the specific issue,
    we defer to the agency’s interpretation if it is based on a permissible construction of
    the statute. 
    Chevron, 467 U.S. at 842-43
    ; Sierra 
    Club, 787 F.3d at 1057
    . For a
    construction to be permissible, we need not conclude it was the only one the agency
    could reasonably have adopted or that we would have rendered the same
    interpretation if the question arose initially in a judicial context. 
    Chevron, 467 U.S. at 843
    n.11. We look only to whether the implementing agency’s construction is
    reasonable. Nat’l Cable & Telecomms. Ass’n v. Brand X Internet Servs., 
    545 U.S. 967
    , 980 (2005).
    b. Paragraph (c)(2)(B)
    The Tax Court relied on ¶ (c)(2)(B) to determine that Keller was precluded
    from challenging its liability at the CDP hearing. As outlined above, ¶ (c)(2)(B)
    precludes a taxpayer from challenging the existence or amount of the underlying tax
    liability at a CDP hearing if the taxpayer had a prior “opportunity to dispute” that
    liability—i.e., the taxpayer received a statutory notice of deficiency or otherwise had
    an “opportunity to dispute” the underlying tax liability. When ¶ (c)(2)(B) precludes a
    taxpayer from challenging its liability at the CDP hearing, the Tax Court accordingly
    lacks authority to review the liability determination because that issue was not
    properly before the CDP hearing. 
    Goza, 114 T.C. at 182-83
    .
    - 28 -
    c. Treas. Reg. § 301.6330-1
    In Treas. Reg. § 301.6330-1, the IRS explained that ¶ (c)(2)(B)’s reference to
    “opportunity to dispute” “includes a prior opportunity for a conference with Appeals that
    was offered either before or after the assessment of the liability.” This clarification was
    promulgated in response to public comment about the proposed regulation.
    Miscellaneous Changes to Collection Due Process Procedures Relating to Notice and
    Opportunity for Hearing Prior to Levy, 71 Fed. Reg. 60827-02, 60830 (Oct. 17, 2006) (to
    be codified at 26 C.F.R. pt. 301) (“For liabilities not subject to deficiency procedures, the
    offer of an Appeals conference prior to assessment constitutes an opportunity to dispute
    the liability under section 6330(c)(2)(B).”). The IRS rejected the suggestion to limit this
    restriction to prior judicial proceedings:
    According to the comments, the only opportunity to dispute the tax liability
    that is sufficient to prevent the taxpayer from challenging the liability in a
    CDP hearing is the prior opportunity to dispute the liability in a judicial
    forum. The IRS and the Treasury Department believe that the existing
    regulations correctly include an opportunity for an Appeals conference as a
    preclusive prior opportunity. The text of section 6330(c)(2)(B) does not
    contain language limiting prior opportunities to judicial proceedings.
    Moreover, it is consistent for a taxpayer who has had an opportunity to
    obtain a determination of liability by Appeals in one administrative hearing
    to be precluded from obtaining an Appeals determination in a subsequent
    CDP administrative hearing with respect to the same liability. This
    interpretation of section 6330(c)(2)(B) has been upheld by the courts. See,
    e.g., Pelliccio v. United States, 
    253 F. Supp. 2d 258
    , 261-62 (D. Conn.
    2003). Accordingly, the final regulations do not adopt this suggestion.
    
    Id. (emphasis added).
    - 29 -
    d. Tax court interpretation
    The Tax Court applied Chevron deference to Treas. Reg. § 301.6330-1 in Lewis v.
    Commissioner and held the regulation was a reasonable interpretation of ¶ (c)(2)(B). In
    Lewis, like here, the Tax Court affirmed summary judgment for the Commissioner
    because the taxpayer had a prior opportunity to dispute his underlying tax liability in a
    conference with the Appeals Office. 
    128 T.C. 62
    .
    Applying the first step of Chevron, the Tax Court held that ¶ (c)(2)(B)’s
    “otherwise have an opportunity to dispute” language is ambiguous. See 
    id. at 55.
    It
    noted that neither the 1998 IRS Restructuring and Reform Act nor the Code defined the
    phrase. 
    Id. Moreover, the
    court said that the phrase could fairly be read to suggest
    different possible meanings, each finding support in the context of the statute: (1) it
    could include only judicial review or (2) it could also include challenges before the
    Appeals Office. 
    Id. at 55-56.
    Moving to Chevron step two, the Tax Court examined the possible meanings of
    the statute outlined above and concluded that Treas. Reg. § 301.6330-1’s interpretation of
    ¶ (c)(2)(B) was reasonable. 
    Id. at 61.
    Addressing the contrary view that ¶ (c)(2)(B)
    could be read to include only judicial review, the Tax Court said:
    As we see it, if Congress had intended to preclude only those taxpayers
    who previously enjoyed the opportunity for judicial review of the
    underlying liability from raising the underlying liability again in a
    collection review proceeding, the statute would have been drafted to clearly
    so provide. The fact that Congress chose not to use such explicit language
    leads us to believe that Congress also intended to preclude taxpayers who
    were previously afforded a conference with the Appeals Office from raising
    the underlying liabilities again in a collection review hearing and before
    this Court.
    - 30 -
    
    Id. The Tax
    Court also offered several rationales to justify including administrative
    proceedings in the definition of prior “opportunities” that would bar a subsequent
    challenge of the underlying tax liability at a CDP hearing and thus found Treas. Reg.
    § 301.6330-1 to be a reasonable interpretation of ¶ (c)(2)(B).11
    3. Analysis
    The Tenth Circuit has not addressed whether ¶ (c)(2)(B) precludes a challenge
    to liability at a CDP hearing when the taxpayer’s prior opportunity to dispute liability
    occurred at an administrative, non-judicial proceeding.12
    a. Applying Chevron
    Applying the two-step Chevron test, we conclude, as the Tax Court did in
    Lewis, that ¶ (c)(2)(B)’s reference to a prior “opportunity to dispute” is ambiguous
    11
    The Eighth Circuit and Tax Court have similarly precluded liability
    challenges at CDP hearings under ¶ (c)(2)(B) when the taxpayer had a prior
    opportunity to dispute its liability before the Appeals Office. See, e.g., Hassell
    Family Chiropractic, DC, PC v. Comm’r, 368 F. App’x 695, 696 (8th Cir. 2010)
    (unpublished) (barring taxpayer from challenging liability before Tax Court under ¶
    (c)(2)(B) where it had a prior conference with an IRS Appeals Officer); Bishay v.
    Comm’r, T.C. Memo. 2015-105, at *6 (2015) (holding that a taxpayer had an
    “opportunity” to dispute his liability when he received a Letter 1153 and had a
    subsequent conference with the Office of Appeals, “precluding [the taxpayer] from
    re-raising that argument at his CDP hearing” under ¶ (c)(2)(B)).
    12
    In Shaffer v. Comm’r, 55 F. App’x 532, 535 (10th Cir. 2003) (unpublished),
    we applied ¶ (c)(2)(B) and barred reconsideration of the taxpayer’s liability when it
    had previously raised the issue of liability in a Tax Court proceeding. We made no
    comment in Shaffer about the statute’s application to a prior administrative
    opportunity to dispute liability.
    - 31 -
    and that Treas. Reg. § 301.6330-1 is a reasonable interpretation of ¶ (c)(2)(B). We
    therefore affirm the Tax Court’s grant of summary judgment.
    i.   Step one
    In step one of the Chevron analysis, we determine whether the statute is
    ambiguous. Here, ¶ (c)(2)(B) is ambiguous on its face and when analyzed within the
    context of § 6330.
    Keller and the Commissioner agree that the language of ¶ (c)(2)(B) does not
    define which prior “opportunities” to dispute tax liability Congress intended to
    include. The Tax Court in Lewis found that ¶ (c)(2)(B) was subject to competing
    interpretations. 
    128 T.C. 55
    . Looking at the language of ¶ (c)(2)(B), we agree that
    what constitutes an “opportunity to dispute” is subject to more than one reasonable
    interpretation: it may refer only to judicial review, only to administrative review, or
    both.
    Paragraph (c)(2)(B)’s surrounding text contributes to this ambiguity.
    Paragraph (c)(4)(A) expressly precludes consideration of issues at a CDP hearing that
    were raised and considered at any other “administrative or judicial proceeding”
    (emphasis added). In contrast, ¶ (c)(2)(B) refers to prior “opportunity to dispute” but
    is silent on what type of opportunity the phrase includes.
    Paragraph (c)(2)(B)’s text is thus ambiguous. Neither the surrounding text of
    § 6330 nor the rest of the Code define what Congress intended by “otherwise have an
    opportunity to dispute.” Accord Lewis, 
    128 T.C. 55
    .
    - 32 -
    ii.   Step two
    In step two of the Chevron analysis, we determine whether the agency’s
    interpretation is based on a permissible construction of the statute. Here, we
    conclude that Treas. Reg. § 301.6330-1(e)(3)’s explanation that a prior ¶ (c)(2)(B)
    “opportunity to dispute” includes “a prior opportunity for a conference with Appeals
    that was offered either before or after the assessment of the liability” is a reasonable
    interpretation of ¶ (c)(2)(B).
    First, focusing on the text, ¶ (c)(2)(B) states:
    The person may also raise at the hearing challenges to the existence or amount
    of the underlying tax liability for any tax period if the person did not receive
    any statutory notice of deficiency for such tax liability or did not otherwise
    have an opportunity to dispute such tax liability.
    The word “hearing” refers to the CDP hearing. Because the tax liability in this
    case is a penalty and not a deficiency, the key language is “did not otherwise have an
    opportunity to dispute such tax liability.” Nothing on the face of this text excludes
    an administrative proceeding from an “opportunity to dispute” a tax penalty. And
    nothing suggests that reading “opportunity to dispute” to include an administrative
    proceeding is unreasonable. The text of the statute therefore supports the
    reasonableness of Treas. Reg. § 301.6330-1(e)(3)’s interpretation of ¶ (c)(2)(B).
    Second, considering the key language in the statute’s broader context,
    ¶ (c)(4)(A) bars taxpayers from raising an issue at a CDP hearing that was raised and
    considered in a judicial or administrative forum. It is reasonable to conclude that
    - 33 -
    Congress regarded an administrative hearing as adequate to preclude CDP hearing
    consideration under ¶ (c)(2)(B) as well.13
    Third, we find the Tax Court’s reasoning in Lewis persuasive. There, the court
    said it would be “possible to interpret ‘otherwise have an opportunity to dispute’ to refer
    to those situations where a taxpayer was afforded one of the other, nondeficiency,
    avenues for prepayment judicial review.” 
    128 T.C. 56
    . But, after pointing out several
    problems with this interpretation, the court concluded it was “unlikely that this was
    Congress’s intent.” 
    Id. at 61.
    For example, the Tax Court observed that if Congress had intended to limit
    ¶ (c)(2)(B) to prior judicial review, it could simply have said “opportunity to seek
    judicial review.” 
    Id. at 57.
    Moreover, the judicial-only interpretation Keller proposes
    would “encourage a taxpayer to wait until a collection action begins before disputing [a
    nondeficiency] liability” to obtain judicial, rather than administrative, review of liability.
    
    Id. at 58.
    But this would minimize the role of the Appeals Office and contradict the
    purpose of the 1998 IRS Restructuring and Reform Act. Congress intended to provide
    the taxpayer a means to seek review of a liability through an informal conference with the
    Appeals Office, 
    id. at 59—“a
    meaningful process, short of litigation, in which [the
    taxpayer] could resolve tax disputes,” 
    id. at 60;
    see also Giamelli v. Comm’r, 
    129 T.C. 107
    , 114 (2007).
    13
    See Bankers Life and Cas. Co. v. United States, 
    142 F.3d 973
    , 983 (7th Cir.
    1998) (“In the second step [of Chevron], the court determines whether the regulation
    harmonizes with the language, origins, and purpose of the statute.”).
    - 34 -
    We agree with these points and the Tax Court’s conclusion that “it is reasonable”
    to read ¶ (c)(2)(B) “to conclude that Congress intended not only to address those
    taxpayers who were previously provided an opportunity to litigate their liability, but also
    those provided an opportunity to dispute the liability short of litigation.” 
    128 T.C. 60
    .
    Thus, under ¶ (c)(2)(B), “[a] conference with the Appeals Office provides a taxpayer a
    meaningful opportunity to dispute an underlying tax liability.” 
    Id. at 61.
    It follows that
    the regulation interpreting ¶ (c)(2)(B) in this manner is a reasonable construction of the
    statute.
    b. Keller’s arguments
    Keller argues Treas. Reg. § 301.6330-1 is an unreasonable interpretation of
    ¶ (c)(2)(B) because it (1) impermissibly limits the jurisdiction of the Tax Court and
    the federal courts; and (2) is internally inconsistent. These arguments do not
    persuade us that the regulation is unreasonable or “arbitrary, capricious, or manifestly
    contrary to the statute,” 
    Chevron, 467 U.S. at 844
    .
    i.   Limiting jurisdiction
    Keller argues that Treas. Reg. § 301.6330-1 impermissibly limits the
    jurisdiction of the Tax Court through a regulation and thus should not receive
    Chevron deference. We disagree.
    Treas. Reg. § 301.6330-1 does not diminish the jurisdiction of any court.
    Section 6330(d) establishes the Tax Court’s jurisdiction to review CDP proceedings.
    Treas. Reg. § 301.6330-1 limits only the scope of what may be heard at the agency’s
    - 35 -
    administrative CDP proceedings.14 Although the Tax Court has jurisdiction only to
    hear matters that were properly before the CDP hearing, see Goza, 
    114 T.C. 182
    -
    83, Treas. Reg. § 301.6330-1 does not address the Tax Court. It addresses matters
    that may be raised before an administrative CDP hearing.
    Moreover, Treas. Reg. § 301.6330-1 has no impact on the taxpayer’s ability to
    file a refund suit in federal district court. The jurisdiction of federal courts remains
    available for a taxpayer to contest its liability.
    ii.   Inconsistencies
    Keller argues that Treas. Reg. § 301.6330-1 contains internal inconsistencies
    and is thus unreasonable. We disagree.
    First, Keller contends Treas. Reg. § 301.6330-1 is inconsistent because it
    precludes liability challenges at a CDP hearing even when the taxpayer failed to exercise
    its opportunity to dispute liability at the Appeals Office and was therefore not actually
    heard. But this is not an inconsistency. As explained previously, the statute and the
    regulation refer only to an “opportunity,” not to an opportunity that was exercised. See
    Chandler, 327 F. App’x at 766 (holding taxpayer was properly precluded from
    challenging liability at a CDP hearing when it had a prior opportunity to dispute liability
    and did not exercise it). Not only is the regulation internally consistent, it comports with
    the purpose of encouraging taxpayers to use the Appeals Office process.
    14
    We agree with the IRS’s Office of Chief Counsel, who explained: “This
    preclusive effect does not define the scope of the reviewing court’s jurisdiction but
    defines only when a taxpayer can challenge his or her liability.” Collection Due
    Process Cases, Office of Chief Counsel Notice, CC-2003-016, Internal Revenue
    Service at 16 (May 29, 2003).
    - 36 -
    Second, Keller argues Treas. Reg. § 301.6330-1 is inconsistent because it
    precludes liability challenges at a CDP hearing for some, but not all, prior administrative
    opportunities. For example, Keller notes that Treas. Reg. § 301.6330-1’s explanation of a
    prior “opportunity” does not include liability challenges previously heard at a conference
    with the Examination Division of the IRS or by the Appeals Office in a pre-assessment
    hearing for a liability subject to deficiency procedures. But again, Keller fails to show an
    internal inconsistency. Nothing in the regulation mentions conferences with the
    Examination Division or is inconsistent with allowing challenges at the CDP hearing for
    liabilities subject to deficiency procedures. Moreover, Keller fails to show that drawing
    distinctions among different administrative processes is unreasonable or arbitrary or that
    it is inconsistent to treat different administrative proceedings differently. See Mayo
    
    Found., 562 U.S. at 59
    (“Regulation, like legislation, often requires drawing lines.”). In
    particular, Keller has not shown that the prior Appeals Office opportunity addressed in
    Treas. Reg. § 301.6330-1 is similar to or serves similar purposes as the other
    administrative proceedings Keller cites as falling outside the regulation.
    In short, Keller’s internal inconsistency arguments fall short of showing that
    Treas. Reg. § 301.6330-1 is arbitrary, capricious, or manifestly contrary to the statute.
    - 37 -
    III. CONCLUSION
    For the foregoing reasons, we affirm the Tax Court’s grant of summary
    judgment.15
    15
    Keller and the Commissioner have each filed an unopposed motion
    requesting judicial notice of certain materials. Keller’s motion tenders a document
    regarding calculation of its penalty. Because we do not, and need not, reach this
    issue, we deny Keller’s motion. The Commissioner’s motion provides a
    supplemental appendix containing documents from Tax Court decisions relevant to
    Keller’s appeal and comporting with Fed. R. Evid. 201(b)(2). See Estate of
    McMorris v. Comm’r, 
    243 F.3d 1254
    , 1259 n.8 (10th Cir. 2001). Accordingly, we
    grant the Commissioner’s motion.
    - 38 -