What was changed
The notice lists the specific change. Common CP12 triggers: EIC calculation, Child Tax Credit, education credits, dependent issues, or transcription errors. The IRS usually gets the math right, but not always.
If you disagree
You have 60 days to contest the change. Respond in writing with documentation. If the 60 days pass without contest, the change becomes final.
Common questions
- Can I cash the refund check if I disagree?
- Yes, cashing it doesn't waive your right to dispute. But respond within 60 days to preserve the argument.
Related
IRS Notice & Letter Response
Responding to IRS notices (CP2000, CP14, CP504, LT11 and others) within the deadline, with proper documentation. You get a copy of the entire response packet.
Amended Tax Returns
File Form 1040-X to correct a prior year return within the three-year window. We handle federal and state amendments for missed income, deductions, or credits.
Responding to an IRS CP2000 Notice
A CP2000 is an automated IRS underreporter inquiry: third-party income doesn't match your return. You have 30 days to respond. How to agree or dispute.