IRS Letter 531
Notice of Deficiency
IRS Letter 531 is a Notice of Deficiency, which means the IRS has determined that you owe additional tax. It is one of the most serious letters the IRS sends and gives you 90 days to file a petition with the U.S. Tax Court if you disagree.
This notice also informs you of your right to a Collection Due Process Hearing. This is a very important notice providing a very limited time to file a timely appeal. A phone call to the IRS does NOT extend the deadline to timely appeal. By timely appealing this notice, the IRS is prohibited from pursuing collection action against you for the balance due referenced in the notice AND you are provided rights to Tax Court review if the IRS fails to follow the law, a very powerful weapon to utilize during negotiations with the IRS.
It is highly recommended that you contact a tax lawyer to discuss your appeal rights immediately upon receiving this notice.
▸ Why Did I Receive IRS Letter 531?
You received this notice because:
The IRS audited your return and is proposing changes
You didn’t respond to earlier notices like CP2000 or Letter 525
The IRS believes you underreported income, took ineligible deductions, or misstated credits
You did not file a return, and the IRS created a Substitute for Return (SFR) based on third-party data
▸ What’s in the Letter 531?
This notice includes:
The tax year(s) the IRS believes were incorrect
A detailed explanation of the proposed changes
The amount of additional tax you owe
Your right to file a petition with the U.S. Tax Court
A strict 90-day deadline (or 150 days if you're outside the U.S.)
- If you don’t respond within 90 days, the IRS will assess the tax and begin collection. You lose the right to challenge the changes in court unless you first pay the balance.
▸ What Should You Do?
Act immediately. Time starts running from the date on the notice and not the day you receive it.
Do not ignore it. After 90 days, the IRS can assess the tax and begin collections.
Review the IRS's proposed changes with a professional.
Prepare and file a U.S. Tax Court petition if you disagree this is your only pre-payment challenge route.
If you agree with the notice, you can sign and return the waiver included to resolve the case faster.
▸ When to Call a Tax Attorney
Letter 531 is not just a bill, it’s a legal document that opens the door to IRS enforcement. A tax attorney can:
Review the IRS’s position and determine if the changes are justified
File a formal petition with the U.S. Tax Court
Help you prepare documentation and legal arguments
Negotiate settlement options or penalty relief if appropriate
If you’ve received a Notice of Deficiency, the clock is ticking, and you need legal help immediately. This is your last chance to stop the IRS from finalizing the debt.
▸ Respond Before It’s Too Late
The 90-day deadline is firm, and once it passes, your options shrink dramatically.
Call (903) 595-1000 or fill out this quick form to schedule a consultation and protect your rights today.