What this right means
You have the right to appeal an IRS decision in an independent forum. In practice, this means you are entitled to a fair and impartial administrative appeal of most decisions the IRS makes, including many penalties. It is one of the ten rights that make up the Taxpayer Bill of Rights, and understanding it helps you if you ever need to work with the IRS on a personal tax matter.
Important facts about this right
The IRS Office of Appeals must be independent of and separate from the IRS office that first reviewed your case. As a rule, Appeals will not discuss a case with the IRS in a way that could compromise its independence.
If you don't agree with an IRS decision, refer to Publication 5, Your Appeal Rights and How To Prepare a Protest If You Don't Agree, for details on how to appeal.
If you receive a statutory notice of deficiency — a notice proposing additional tax — you may file a timely petition with the United States Tax Court to dispute the proposed adjustment before you have to pay the tax.
You have the right to receive a written response regarding a decision from the Office of Appeals.
When you can go to court
Generally, you may file a refund suit in a United States District Court or the United States Court of Federal Claims if all of the following apply:
You have fully paid the tax and the IRS has denied your refund claim.
No action has been taken on your refund claim within six months.
It has been less than two years since the IRS mailed you a notice denying the refund.
Why this matters for non-residents and foreign founders
For non-residents and foreign founders, the takeaway is reassuring: the IRS is not the last word. Most determinations — including penalties that can hit late or misunderstood filings — can be sent to an independent review, and in some cases to court. Two deadlines are worth committing to memory. A petition to the U.S. Tax Court following a notice of deficiency lets you dispute the tax before paying it, and it is strictly time-limited. A refund suit, by contrast, requires you to pay first and generally must be filed within two years of a denied refund claim. If you're weighing an appeal from abroad, note these dates early — missing them can close the door on options you'd otherwise have.
Sources
IRS: Taxpayer Bill of Rights — https://www.irs.gov/taxpayer-bill-of-rights
IRS Publication 1: Your Rights as a Taxpayer — https://www.irs.gov/forms-pubs/about-publication-1
IRS Publication 5: Your Appeal Rights and How To Prepare a Protest If You Don't Agree — https://www.irs.gov/pub/irs-pdf/p5.pdf
Taxpayer Advocate Service — https://www.taxpayeradvocate.irs.gov/
United States Tax Court — https://www.ustaxcourt.gov/