US Tax Court Petition: When to File, What to Expect, Pro Se vs Represented

The US Tax Court is the only court where you can dispute a tax assessment before paying it. Federal district court and the Court of Federal Claims both require you to pay the tax first and then sue for a refund. Tax Court lets you challenge the IRS’s determination while the money is still in your pocket. The entry point is a petition, filed within 90 days of the IRS’s notice of deficiency (the “90-day letter”). For deficiencies of $50,000 or less per year, the small tax case procedure (S case) offers a simplified, less formal process. About 70% of Tax Court petitioners represent themselves (pro se). This page covers the mechanics.

What triggers the right to petition?

The IRS must send you a “notice of deficiency” (also called a 90-day letter or statutory notice) before it can assess additional tax. The notice of deficiency is required by IRC 6212. It tells you the IRS has determined that you owe additional tax for a specific year and gives you the amount. It also tells you that you have 90 days to petition the Tax Court (150 days if the notice is addressed to you outside the United States).

The notice of deficiency is different from a CP2000, a penalty notice, or a collection notice. Those are administrative actions. The notice of deficiency is the IRS’s statutory prerequisite for assessing a tax deficiency, and it is the trigger for Tax Court jurisdiction. If you did not receive a notice of deficiency, you generally cannot petition the Tax Court for that year (with limited exceptions, such as certain penalty assessments after Farhy v. Commissioner).

For cross-border filers: if the notice of deficiency is sent to an address outside the United States, the deadline is 150 days, not 90 days (IRC 6213(a)). The IRS sends the notice to your “last known address,” which is the address on your most recent return. If you moved from the US to Canada and did not update your address with the IRS, the notice may go to your old US address, and you may not receive it. The 90-day (or 150-day) clock starts on the date the notice is mailed, not the date you receive it.

How do I file a petition?

The Tax Court petition is a straightforward form. The Tax Court provides a template (Form 2 for regular cases, Form 4 for small tax cases) on its website. The petition must include:

1. Your name, address, and Social Security number.
2. The date and city of the notice of deficiency.
3. The tax year(s) in dispute.
4. The amount(s) in dispute.
5. A clear statement of the errors you allege in the notice of deficiency.
6. The facts supporting your position.

The filing fee is $60 for all cases. File the petition by mail or electronically through the Tax Court’s electronic filing system (DAWSON). The petition must be received by the Tax Court (or postmarked, if mailed by US mail) within the 90-day (or 150-day) deadline. FedEx, UPS, and other private delivery services are designated delivery services under IRC 7502(f) and the postmark date is treated as the filing date.

Once the petition is filed, the IRS cannot assess the deficiency until the Tax Court case is resolved. Collection is suspended during the litigation (IRC 6213(a)).

Should I choose the small tax case procedure?

The small tax case procedure (S case) is available when the total amount of the deficiency (including penalties) is $50,000 or less for each tax year at issue (IRC 7463). You elect the S case by checking the box on the petition form.

S case advantages:

• Simplified rules of procedure. No formal discovery, no depositions, no interrogatories.
• The trial is less formal. The judge may conduct the hearing in whatever manner the judge considers appropriate.
• Faster resolution. S cases are typically calendared within 6 to 12 months.
• No briefs required (though you can submit one).

S case limitations:

• The decision is final and cannot be appealed by either party. This is a one-shot hearing.
• The decision has no precedential value (it cannot be cited in other cases).
• If the amount in dispute exceeds $50,000 for any year, you cannot elect the S case for that year.

For most self-represented taxpayers with deficiencies under $50,000, the S case is the right choice. The formality reduction is significant, and the faster timeline means less time living with the uncertainty.

What happens after I file?

The Tax Court assigns the case to a judge, and the IRS files an answer (usually within 60 days). The answer is the IRS’s response to your petition, stating which facts it agrees with, which it disputes, and its legal position.

After the answer, the case follows one of several tracks:

Settlement. The majority of Tax Court cases settle before trial. After the petition is filed, the case is assigned to an IRS Appeals officer (separate from the attorney who will try the case). The Appeals officer has settlement authority and may offer to resolve the case for less than the full deficiency. Settlement discussions are confidential and do not prejudice the trial if they fail. This is where representation matters: an experienced practitioner often achieves a better settlement than a pro se petitioner, because the practitioner can evaluate the IRS’s litigation risk and negotiate from an informed position.

Pretrial procedures (regular cases only). In a regular case, the court may schedule a pretrial conference, require stipulations of fact (agreed facts), and set discovery deadlines. S cases skip most of this.

Trial. The Tax Court sits in cities across the United States (and occasionally holds sessions for cases involving taxpayers in US territories). The trial is before a judge, with no jury. You present your case, introduce documents, and testify. The IRS presents its case. The judge may ask questions. In an S case, the trial is typically 30 minutes to a half day. In a regular case, it can be longer.

Decision. The judge issues a written decision (or, in some S cases, a bench decision at the hearing). In a regular case, you can appeal the decision to the US Court of Appeals within 90 days.

Can I represent myself (pro se)?

Yes. About 70% of Tax Court petitioners are pro se. The Tax Court has a pro se section that assists unrepresented petitioners with procedural questions (but not legal advice). The court also maintains a volunteer attorney program (the Tax Court Bar Association Pro Bono Program) that provides free representation to qualifying taxpayers.

Pro se viability depends on the complexity of the case:

Strong pro se candidates: Straightforward factual disputes (the IRS says you did not report income, but you did; the IRS disallowed a deduction, but you have receipts), small deficiencies, and cases where the main issue is documentation.

Weak pro se candidates: Treaty claims (which require understanding of both domestic law and treaty interpretation), transfer pricing disputes, complex foreign tax credit calculations, and cases involving statutory interpretation. For cross-border filers, the treaty issues alone often justify representation.

The Tax Court’s Taxpayer Information page provides guides for pro se petitioners, including how to prepare for trial, how to introduce evidence, and how to make opening and closing statements.

What about information return penalties?

The Tax Court’s jurisdiction over information return penalties is limited and has been in flux since the Farhy v. Commissioner decision.

Farhy v. Commissioner (Tax Court 2023, reversed by DC Circuit 2024): The Tax Court held that the IRS lacked authority to assess Form 5471 penalties under IRC 6038 without first going to court, because IRC 6038 does not contain a self-assessment mechanism. The DC Circuit reversed, holding that the IRS does have assessment authority. The practical effect: the IRS can assess Form 5471/5472 penalties without going to court, but taxpayers can challenge those assessments through a refund suit (pay the penalty, file a refund claim, and sue in district court or the Court of Federal Claims). Tax Court jurisdiction over these penalties remains uncertain.

FBAR penalties are not under the Tax Court’s jurisdiction. FBAR penalties are assessed under 31 USC 5321 (the Bank Secrecy Act), not the IRC. The appropriate forum for challenging FBAR penalties is federal district court.

Form 3520 penalties are assessed under IRC 6677. The Tax Court may have jurisdiction if the penalty is part of a deficiency proceeding, but the case law is developing.

For cross-border filers, the limitation on Tax Court jurisdiction means that the biggest penalties (FBAR, Form 5471, Form 3520) often cannot be challenged in Tax Court. These penalties require either administrative abatement (reasonable cause) or a refund suit in district court.

What if I live outside the United States?

You can petition the Tax Court from anywhere in the world. The petition can be filed electronically (DAWSON) or by mail. The 150-day deadline applies if the notice of deficiency was sent to an address outside the US.

For the trial, the Tax Court schedules hearings in US cities. If you live in Canada, the closest sessions are typically in cities like Buffalo, Detroit, or Seattle (the Tax Court does not sit in Canada). You can request a trial location convenient to your US address (if you have one) or to the nearest city where the court holds sessions. The court may also allow remote participation in appropriate cases.

If you cannot attend in person, discuss the options with the court clerk’s office. The Tax Court has expanded remote hearing capabilities and may permit telephonic or video participation, particularly for S cases.

What should I do next?

Check the date on the notice of deficiency. Count 90 days (or 150 days if the notice was sent outside the US). If you are within the window, file the petition (Form 2 or Form 4) with the $60 fee. Elect the S case if the deficiency is $50,000 or less. If the treaty is at issue, consider engaging a practitioner for the settlement discussions. If the deadline has passed, the deficiency is assessed and your options narrow to paying the tax and filing a refund claim.

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.