Understanding your CP21B notice

What this notice is about

We sent you this notice because we made the changes you requested to your tax return for the tax year specified on your notice. You should receive your refund within 2-3 weeks of your notice.


What you need to do

  • If you disagree with the changes we made, contact us at the number shown in the “What you need to know” section of your notice.
  • Correct the copy of your tax return that you kept for your records.
  • Be sure to report any interest we paid you on your tax return for this year. For more information on reporting interest income, see About Form 1099-INT, Interest Income.

Frequently asked questions

What if I don't receive my refund in 2-3 weeks? (updated Nov. 4, 2024)

If you don't owe other taxes or debts we're required to collect, such as child support, and 3 weeks have lapsed, call us at number shown in the “What you need to know” section of your notice.

Will I receive information about the interest that I need to report on my next tax return? (updated Nov. 4, 2024)

If you receive any interest, you must report this amount on your tax return.

If you receive $10 or more in interest, you'll receive a Form 1099-INT, Interest Income, by Jan. 31 of next year.

I don't remember sending a request to IRS to change my return. How can I find out what IRS received to initiate this change? (updated Nov. 4, 2024)

Call us at the number shown in the “What you need to know” section of your notice.

What if I need to make another correction to my account?

You'll need to file Form 1040-X, Amended U.S. Individual Income Tax Return.

What if I haven't gotten answers after contacting IRS several times?

Call the Taxpayer Advocate at 877-777-4778​ or for TTY/TDD 800-829-4059​.

What if I think I'm a victim of identity theft? (updated Nov. 4, 2024)

Call us at the number shown in the “What you need to know” section of your notice. Refer to Identity Theft Central for more information.


Tips for next year

Consider filing your taxes electronically. Filing online can help you avoid mistakes and find credits and deductions that you may qualify for. In many cases you can file for free. Learn more about e-file.

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