The Notice of Deficiency in your hands — the 90-day letter — is the IRS's formal statement that it intends to assess additional tax. It's also a ticket: ninety days to file a petition in United States Tax Court, and that deadline is jurisdictional. Day 91, the courthouse door is closed, the tax assesses, and your options shrink to paying first and fighting later.
Why Tax Court Is Built for Taxpayers
Tax Court is the only forum where you litigate before paying. File the petition and assessment stops; collection stops; the case moves to a court that hears nothing but tax, with trial sessions held right here in Tampa. For disputes of fifty thousand dollars or less per year, the small-case election offers simplified procedures — informal, faster, no appeal, designed for cases that need a fair hearing more than a federal production.
And here's the part most people miss: filing the petition is usually how you get the settlement. Docketed cases route through IRS Appeals and Chief Counsel, where government attorneys weigh hazards of litigation honestly because a judge is now watching. The overwhelming majority of petitions settle. The petition isn't a declaration of war; it's the price of admission to the negotiation that matters.
Ninety Days Means Ninety Days
Check the date on the notice itself — the clock runs from mailing, not from when you found the envelope. I'm admitted to practice before the United States Tax Court, and the most heartbreaking calls I get are day-95 calls. If a Notice of Deficiency is sitting on your kitchen table right now, the calendar is the whole case. Let's talk this week, not next month.