IRS notice

IRS Notice CP12: Your return was changed and your refund changed

See if you qualify or call (833) 899-0099

What it means

The IRS corrected an error on your return. Your refund is now larger or smaller than you expected, or you get a refund you didn’t expect.

What to do now

Check the correction. If it’s right, there’s nothing to pay. If it’s wrong, contact the IRS to dispute it before the deadline.

Deadline

Usually 60 days from the notice date to dispute the change. Always go by the date printed on your notice.

Last updated October 15, 2026.

Get help with your CP12

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What waiting costs

IRS penalty and interest calculator

What's your situation?
Your balance
Tax owed$10,000
Penalties & interest$1,345
Total you'd owe today$11,345
Failure to file$0
Failure to pay$600
Interest$745

Estimate only, not tax advice. Federal tax and penalties at the IRS's standard rates, before credits and state taxes. Unfiled-year tax uses 2025 brackets and assumes W-2 income had taxes withheld. Interest uses the IRS rate of 7% a year (October to December 2026), compounded daily; the rate resets every quarter.

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