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, as required by IRC 6212. It tells you the amount the IRS says you owe and gives you 90 days to petition the Tax Court (150 days if addressed outside the US).

The notice of deficiency is different from a CP2000, a penalty notice, or a collection notice. It is the statutory prerequisite for assessing a deficiency and the trigger for Tax Court jurisdiction.

Key details for cross-border filers:

• The 150-day deadline applies when the notice goes to an address outside the US (IRC 6213(a))
• The IRS sends it to your “last known address” (the one on your most recent return); if you moved to Canada without updating your address, the notice may go to your old US address
• The clock starts on the date the notice is mailed, not the date you receive it
• If you did not receive a notice of deficiency, you generally cannot petition the Tax Court for that year (limited exceptions exist, such as certain penalties after Farhy v. Commissioner)

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 states which facts the IRS agrees with, which it disputes, and its legal position. After the answer, the case follows one of several tracks.

Settlement. The majority of cases settle before trial. The case is assigned to an IRS Appeals officer with settlement authority who may resolve it for less than the full deficiency. This is where representation matters: a practitioner can evaluate the IRS’s litigation risk and negotiate from an informed position.

The remaining tracks:

• Pretrial procedures (regular cases only): the court may schedule a pretrial conference, require stipulations of fact, and set discovery deadlines. S cases skip most of this.
• Trial: before a judge (no jury) in a US city. You present your case and testify. In an S case, 30 minutes to a half day. In a regular case, longer.
• Decision: the judge issues a written decision. In a regular case, you can appeal to the US Court of Appeals within 90 days. S case decisions are final and cannot be appealed.

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 with procedural questions (not legal advice), and a volunteer attorney program (the Tax Court Bar Association Pro Bono Program) provides free representation to qualifying taxpayers.

Pro se viability depends on complexity:

• Strong candidates: straightforward factual disputes (unreported income you can document, disallowed deductions with receipts), small deficiencies, documentation issues
• Weak candidates: treaty claims, transfer pricing, complex foreign tax credit calculations, statutory interpretation. For cross-border filers, treaty issues alone often justify representation

The Tax Court’s Guidance for Petitioners 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 Farhy v. Commissioner.

The key rulings and boundaries:

• Farhy v. Commissioner: The Tax Court held the IRS lacked authority to assess Form 5471 penalties without going to court. The DC Circuit reversed. Taxpayers can challenge assessments through a refund suit (pay, file a claim, sue in district court or the Court of Federal Claims).
• FBAR penalties are assessed under 31 USC 5321 (Bank Secrecy Act), not the IRC. The forum is federal district court.
• Form 3520 penalties under IRC 6677: Tax Court may have jurisdiction if part of a deficiency proceeding, but the case law is developing.

For cross-border filers, the biggest penalties (FBAR, Form 5471, Form 3520) often cannot be challenged in Tax Court. They require administrative abatement 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. File 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 Buffalo, Detroit, or Seattle. Logistics:

• Request a trial location convenient to your nearest US city where the court holds sessions
• The court may allow remote participation (telephonic or video), particularly for S cases
• Contact the court clerk’s office to discuss options if you cannot attend in person

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.