Understanding Your Letter 4464C

What this letter is about

Verifying your income and income tax withholding

If you filed a return

  • You don't need to take any action. Please do not call us until 60 days after the letter date and only if you haven't received your refund or heard from us by then.
  • We recommend you review your return for any errors and file a corrected or amended return to correct the information.

You may want to

  • Review this letter with your tax preparer.
  • Consider an IRS Identity Protection PIN to help prevent misuse of your taxpayer identification number on fraudulent federal income tax returns. Learn more at IRS.gov/ippin.
  • Contact Taxpayer Advocate Service (TAS) if you're experiencing an economic hardship or need help in resolving problems. You can reach TAS at 877-777-4778 or TTY/TTD 800-829-4059.

Frequently asked questions

Why is my return being reviewed?

We select some returns to determine if income, expenses, and credits are being reported accurately. This doesn't mean you made an error or were dishonest.

What if I didn't file the tax return?

Someone else may have filed it for you without your consent. Send us a completed and signed Form 14039, Identity Theft AffidavitPDF. You may want to read our identity theft resources page while we review your Form 14039.

Helpful Information

If you haven't received your refund or heard from us after 60 days, you can call us at 800-829-1040.

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