IRS notice CP11
CP11 notice: the IRS corrected your return and you owe
A CP11 means the IRS corrected one or more mistakes on your tax return, and the amount you owe changed as a result. The notice shows what was changed. If you agree, you pay; if you disagree, the date on the notice is the one that matters most.
If you agree with the changes
Read the “What we changed on your return” section to see each change and how it affected what you owe. Then pay the amount by the date on the notice to avoid more penalties and interest, or set up a payment plan if you cannot pay it all now.
Correct the copy of your return that you kept, but do not send it to the IRS. If you used a preparer, have them correct their copy too, so the same error does not carry into next year.
If you disagree
Contact the IRS by the date on the notice, at the number in its “Where to find more information” section. The IRS says the fastest way to resolve many of these errors is by phone, and if it needs a missing or corrected form, you can fax it during the call.
The IRS will reverse most changes it made if they increased what you owe or if your return requested a refund. You do not have to give an explanation or documents to request the reversal, though they can speed it up. If the IRS does not get information supporting your original return, it may send the case to audit, and the audit staff will contact you within six weeks.
Why the date on the notice matters
If you do not contact the IRS by that date, you lose the formal right to have the changes reversed, and your right to appeal the decision to the U.S. Tax Court. The IRS says it will still consider supporting documents you send later, and may reverse the changes if it agrees with you, but by then it is a request, not a right.
Interest matters too. If you do not pay in full by the date on the notice, interest runs on the unpaid balance from the date the return was originally due. A late-payment penalty also applies, which the IRS may remove if circumstances beyond your control kept you from paying and you contact it by the due date.
Want a second pair of eyes on it?
USTAXX can check the notice against the return it refers to. Where the answer is a return — an amended return, a missing year, a corrected form — we prepare it, and you sign and send your own reply. We are an IRS Authorized e-file provider and work with clients remotely through a secure portal, by phone or video, and in person at our office in Naperville, IL.
Questions people ask
Why did I get a CP11?
The IRS found and corrected one or more mistakes on your return, and the correction left you owing money. The notice’s “What we changed on your return” section lists each change.
What happens if I miss the date on a CP11?
You lose the formal right to have the changes reversed and to appeal to the U.S. Tax Court. The IRS may still consider documents you send later, but it is no longer required to.
Do I need to send documents to dispute a CP11?
Not to request the reversal, though documents can resolve it faster. Without information supporting your original return, the IRS may send the case to audit.
Should I file an amended return?
Not to correct what the CP11 changed. Use Form 1040-X only if you need to make a different correction to the same return.
Where these rules come from
- IRS: Understanding your CP11 notice
- IRS: Notice 746, Information About Your Notice, Penalty and Interest
- IRS: Publication 3498-A, The Examination Process
- IRS: Payment plans and installment agreements
General information, current when written, not advice about your situation. Fees and forms change; the official pages above are the authority.