What the U.S. Tax Court Is
The U.S. Tax Court is a federal court that hears disputes between taxpayers and the IRS. Its main value to you is timing. You can challenge the IRS’s numbers before any of the disputed tax leaves your pocket.
When You Can Go to Tax Court
You can usually go to Tax Court once the IRS sends you a notice of deficiency. A deficiency is the extra tax the IRS says you owe beyond what you reported.
The Notice of Deficiency
A notice of deficiency is the IRS’s legal notice that it’s proposing additional tax. The Taxpayer Advocate Service notes it’s often called your “ticket to the Tax Court”. It’s also known as the “90-day letter.” You may get it as Letter 3219 (after a mail audit), Letter 531 (after an in-person audit), or a CP3219A or CP3219N notice.
The IRS must send this notice by certified mail to your last known address. That’s generally the address on your most recently filed tax return.
How a CP2000 Can Lead Here
A CP2000 notice flags income that doesn’t match IRS records, and it isn’t a bill. If the issue stays unresolved, the IRS may send a CP3219A. That notice explains your right to challenge the proposed tax in Tax Court.
Small Tax Case vs. Regular Case
When you file, you choose how your case is handled. The small tax case procedure is available when the amount in dispute is $50,000 or less per tax year.
| Small Tax Case (“S Case”) | Regular Case | |
|---|---|---|
| Amount in dispute (including penalties) | $50,000 or less per tax year | Required above $50,000 per tax year |
| Process | Less formal and quicker | More formal |
| Appeals | Decision can’t be appealed | Decision can be appealed |
| How it applies | You elect it when you file | Applies if you don’t elect an S case |
The trade-off is speed versus a second chance. An S case moves faster, but the decision is final.
How to File a Tax Court Petition
A petition is the formal document that asks the Tax Court to review the IRS’s determination. Here’s how to file one:
- Find the date on your notice of deficiency. Your 90-day deadline counts from that date, or 150 days if the notice is addressed to someone outside the U.S.
- Prepare your petition and attach a copy of the notice.
- Decide whether to elect the small tax case procedure.
- File electronically through the Tax Court’s DAWSON system, or mail it to the United States Tax Court, 400 Second Street, NW, Washington, DC 20217.
- Pay the $60 filing fee online or by mail. If you can’t afford it, you can request a fee waiver.
What Happens If You Miss the Deadline
If you miss the deadline, the Tax Court will generally dismiss your case for lack of jurisdiction, and neither the IRS nor the Tax Court itself can waive the deadline. In a small number of federal circuits, courts have recently allowed exceptions in extraordinary circumstances (such as serious illness), but this is an evolving and unsettled area of law — don’t count on an exception, and treat the 90-day (or 150-day) window as effectively final.
Under the general rule, you’d then have to pay the tax first. After that, you could sue for a refund in a different federal court. Because the window is strict, mark the 90-day date on your calendar as soon as the notice arrives.
Sources
- U.S. Tax Court
- Taxpayer Advocate Service, Letter 3219
- IRS, Understanding Your CP3219N Notice
- Taxpayer Advocate Service, Filing a Petition With the United States Tax Court
