IRS Notice CP12: IRS corrected your return — refund changed
Quick answerThe IRS fixed one or more mistakes on your return, which changed your refund.
Letter / noticeCP12
MeaningIRS corrected your return — refund changed
Action needed?Yes — see steps
What happens next
You have 60 days to dispute the change.
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What you should do
- Compare the correction to your return
- Call or write within 60 days if you disagree
Waiting on your refund? See our estimated IRS refund schedule for 2027 by e-file acceptance week.
Scam check: the IRS first contacts you by mail. Use only the phone numbers printed on your letter or on IRS.gov — never ones from a text, email or unofficial site.
Frequently asked questions
What does IRS Notice CP12 mean?
The IRS fixed one or more mistakes on your return, which changed your refund.
What should I do?
Compare the correction to your return Call or write within 60 days if you disagree
How long does it take?
You have 60 days to dispute the change.
Sources
- IRS: Understanding your IRS notice or letter
- IRS: Get Transcript
- Taxpayer Advocate Service (independent help inside the IRS)
Written by the editorial team and checked against the official sources above. See our editorial policy.
By the TranscriptCodes Editorial Team · Last reviewed 2026-11-12.