VALID › Notice Library › CP51B notice

In the IRS’s own words · not reviewed by VALID

CP51B notice explained, in the IRS’s own words

We computed the tax on your Form 1040 or 1040-SR return. You're due a refund.

Read the full CP51B page on irs.gov ↗

Quoted from www.irs.gov/individuals/understanding-your-cp51b-notice, read October 15, 2026 · fingerprint aa972287a93f

What this notice is about

We computed the tax on your Form 1040 or 1040-SR return. You're due a refund.

What you need to do

  • Read your notice carefully. It explains how we calculated your refund.
  • You don't need to do anything if you agree with our calculations.
  • Contact us if you disagree with the amount of tax we computed.

What should I do if I disagree with the notice?

You can write or call using our contact information found on your notice. If you write us, be sure to explain why you disagree and provide any information you have (such as cancelled checks, amended return, etc.) or have the paperwork ready if you call.

When will I receive my refund?

If you have’nt received your refund and if you don’t owe other taxes or other debts we’re required to collect, you should receive it within 2-4 weeks from the date of your notice.

Tips for next time you file

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.

What to do next

  • Write down the date on the letter today.
  • Look the number up on irs.gov yourself. Don’t trust a link or phone number from anyone else.
  • If it says you owe money or proposes changes to your return, take it to a licensed CPA, EA or tax attorney before that date.

Not advice. Not a filing. Verify with a licensed professional. Rules change by year and facts.

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