The mailing date on a notice of deficiency matters first. A taxpayer in Roswell or Las Cruces then has 90 days to petition the United States Tax Court, or 150 days if the notice is addressed to a person outside the United States. 26 U.S.C. § 6213(a). That window is also when a New Mexico taxpayer picks a courtroom, because four federal forums can decide a federal tax liability, and they differ on prepayment, juries, speed and appellate precedent. Once a petition goes in, § 6512(a) all but closes off a refund suit for that year.
What does the 90-day clock on a notice of deficiency actually control?
Section 6213(a) does two jobs. It sets the window, and it freezes the government: no assessment and “no levy or proceeding in court for its collection” until the period has run and, if a petition is filed, the Tax Court’s decision is final. That freeze makes the Tax Court the default forum: nothing has to be paid to get in, the fee is $60, and petitions go through DAWSON. The cost of that door is the others.
Where does a New Mexico taxpayer actually try a Tax Court case?
The Tax Court lists Albuquerque among its trial locations, noting: “No permanent courtroom. See notice of trial for address.” A petitioner names a city on Form 5, and sessions are uneven. The Spring 2026 term calendared an Albuquerque session for the week of April 6, 2026, marked hybrid; the Fall 2026 forecast for September 7 through December 14, 2026 lists 26 places of trial without Albuquerque, though “REMOTE (Virtual)” appears.
Small tax case treatment under § 7463 is available when $50,000 or less is in dispute for any one taxable year, and the trade is finality: such a decision “shall not be reviewed in any other court.” Who may appear turns on the court’s own bar: Tax Court Rule 200 asks an attorney applicant for a certificate of good standing from the highest court of any state.
What does paying first buy in a refund suit in D.N.M. or the Court of Federal Claims?
A refund suit runs in reverse. In Flora v. United States, 362 U.S. 145 (1960), the Supreme Court read 28 U.S.C. § 1346(a)(1) to require “full payment of the assessment before an income tax refund suit can be maintained.” Section 7422(a) bars suit until a claim has been duly filed, the claim must be timely under § 6511(a), and § 6532(a)(1) blocks suit for six months unless it is disallowed sooner, then bars it two years after a disallowance.
Prepayment buys a jury. The Court of Federal Claims shares that jurisdiction under 28 U.S.C. § 1491(a)(1), but only the district court seats one: 28 U.S.C. § 2402 makes a § 1346(a)(1) action triable “by the court with a jury” at either party’s request. That trial runs in the District of New Mexico, at the Pete V. Domenici U.S. Courthouse in Albuquerque, with Justice Department Tax Division trial attorneys opposite instead of IRS Chief Counsel.
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When can a bankruptcy court decide the tax, and what does a CDP hearing add?
A fourth door opens in bankruptcy. Under 11 U.S.C. § 505(a)(1) the court may determine the amount or legality of a tax, fine or penalty “whether or not previously assessed, whether or not paid,” and whether or not previously adjudicated, in chapters 7, 11, 12 and 13 by way of § 103(a). Section 505(a)(2)(A) withholds it where the amount was already adjudicated before filing, § 505(a)(2)(B) delays refund determinations for up to 120 days, and § 505(b) covers taxes the estate incurs.
The collection due process route is narrower. Section 6330 gives 30 days to request a hearing and another 30 to petition the Tax Court, but the liability can be contested only where the taxpayer got no notice of deficiency and no earlier chance to dispute it.
Where does the appeal go, and why does the Tenth Circuit matter before trial?
Venue follows the taxpayer under § 7482(b)(1): an individual’s legal residence, an entity’s principal place of business. For New Mexico that is the Tenth Circuit in Denver. “The Tax Court’s legal conclusions are subject to de novo review, and its factual findings can be set aside only if clearly erroneous.” Petersen v. Commissioner, 924 F.3d 1111, 1114 (10th Cir. 2019). A Court of Federal Claims case goes to the Federal Circuit, 28 U.S.C. § 1295(a)(3).
That map matters before filing. Under Golsen v. Commissioner, 54 T.C. 742 (1970), where the court of appeals to which appeal lies “has already passed upon the issue before us, efficient and harmonious judicial administration calls for us to follow the decision of that court.” Fed. R. App. P. 13(a)(1)(A) allows 90 days to appeal after entry of the decision, and appealing does not stop collection without the § 7485(a) bond, “not exceeding double” the appealed deficiency.
What happens on the New Mexico side of the same dispute?
State tax disputes run separately. NMSA 1978 § 7-1-24 allows 90 days to protest an assessment of tax over $50, heard by the Administrative Hearings Office under the Administrative Hearings Office Act, not by the Taxation and Revenue Department, with appeal to the New Mexico Court of Appeals within 30 days of the decision. NMSA 1978 § 7-1-25. The federal result loops back: § 7-1-13 calls for a federal adjustments report within 180 days of the final determination date. See also the firm’s gross receipts tax audit guide.
How does this play out for a Roswell dairy owner, and who computes the number?
Take a hypothetical. A dairy owner outside Roswell gets a notice of deficiency mailed October 5, 2026 for tax year 2023: $68,000 plus the § 6662(a) accuracy-related penalty, “20 percent of the portion of the underpayment,” or $13,600. The 90th day is Sunday, January 3, 2027, so § 7503 moves it to Monday, January 4. An S case is off the table above $50,000. Interest has run since the 2023 return came due, § 6601(a), at the 7 percent IRS rate compounded daily for the quarter beginning October 1, 2026, about $1,400 a quarter. A deposit under § 6603 stops that meter without conceding the case.
Paying the $81,600 plus interest, filing a claim, waiting six months and suing in the District of New Mexico buys a jury, at the cost of $95,000 the herd may need more. If the dairy is already in a Chapter 11 or Chapter 12 case, the bankruptcy court reaches the same figures under § 505(a)(1) with no prepayment.
Tax Court Rule 91(a)(1) requires the parties to stipulate “to the fullest extent” fairly reachable, and a stipulation is a conclusive admission, so it gets built from milk checks, feed invoices and depreciation schedules, while the administrative file and the Appeals officer’s workpapers show what the government already accepts. After the opinion, Rule 155 confines each side’s computation “strictly to consideration of the correct computation.” Section 7491 can shift the burden of proof where the taxpayer offers credible evidence and has cooperated, and § 7430 caps cost recovery by the 28 U.S.C. § 2412(d)(2)(B) net worth limits, $2,000,000 for individuals and $7,000,000 for businesses.
| Forum | Pay first? | Fact finder | Key deadline | Appeal to |
|---|---|---|---|---|
| Tax Court deficiency | No | Judge | 90 days, 150 if abroad | Tenth Circuit |
| D.N.M. refund suit | Yes, in full | Jury if asked | Two years from disallowance | Tenth Circuit |
| Federal Claims | Yes, in full | Judge | § 6532(a)(1) window | Federal Circuit |
| Bankruptcy § 505 | No | Judge | Subject to § 505(a)(2) | District court, BAP |
| Tax Court CDP | No | Judge | 30 days to petition | Tenth Circuit |
Frequently Asked Questions
How long does a New Mexico taxpayer have to file a Tax Court petition?
Under 26 U.S.C. § 6213(a) the petition is due within 90 days after the notice of deficiency is mailed, or 150 days if the notice is addressed to a person outside the United States. Assessment and levy are barred while it runs.
Does the Tax Court hold trial sessions in Albuquerque?
Albuquerque is a listed Tax Court trial location with no permanent courtroom, so the notice of trial gives the address. The Spring 2026 term listed an Albuquerque session for the week of April 6, 2026 as hybrid; the Fall 2026 forecast omits it.
Do I have to pay the tax before filing an IRS refund lawsuit in New Mexico?
Yes. In Flora v. United States, 362 U.S. 145 (1960), the Supreme Court held that 28 U.S.C. § 1346(a)(1) requires full payment of the assessment before a refund suit can proceed in district court. A refund claim comes first under § 7422(a).
Can a taxpayer get a jury in a federal tax case?
Only in a district court refund suit. Tax Court and Court of Federal Claims trials are before a judge. Under 28 U.S.C. § 2402, a section 1346(a)(1) action against the United States is tried with a jury on either party’s request.
Can a bankruptcy court determine how much a debtor owes the IRS?
Often, yes. Under 11 U.S.C. § 505(a)(1) the court may determine the amount or legality of any tax, fine or penalty, whether or not previously assessed, paid or contested. Section 505(a)(2)(A) withholds that power if the matter was adjudicated before filing.
Where does a Tenth Circuit tax appeal come from, and what is the deadline?
For an individual, 26 U.S.C. § 7482(b)(1) sends review of a Tax Court decision to the circuit of the taxpayer’s legal residence, the Tenth Circuit for New Mexico. Fed. R. App. P. 13(a)(1)(A) allows 90 days from entry of the decision.
How North Star Law Firm Can Help
North Star Law Firm handles federal tax controversy for New Mexico taxpayers and businesses, from examination through appeal: IRS audit defense, IRS Appeals and collection due process hearings, and United States Tax Court litigation, including the forum analysis that belongs inside the 90-day petition window. The broader tax defense practice covers liens, levies, penalties and collection alternatives.
Phillip Zagotti is an Attorney and CPA admitted to practice before the Internal Revenue Service and the United States Tax Court. He is licensed by the State Bar of California and holds a Texas CPA license; he is not licensed by the State Bar of New Mexico, and the firm works alongside New Mexico-licensed counsel on state-law questions. Also see the firm’s post on the 2026 Ways and Means tax administration bills. To discuss a notice of deficiency or which forum fits a dispute, contact North Star Law Firm.