VALID › Notice Library › CP124 notice

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

CP124 notice explained, in the IRS’s own words

We made changes to your excise tax return because we believe there was a miscalculation.

Read the full CP124 page on irs.gov ↗

Quoted from www.irs.gov/individuals/understanding-your-cp124-notice, read October 15, 2026 · fingerprint c5cbbe544abd · 2 lines left out here (see irs.gov)

What this notice is about

We made changes to your excise tax return because we believe there was a miscalculation.

What you need to do

  • Read your notice carefully — it explains the changes to your tax account. Compare the figures on the notice with your excise tax return.
  • If you disagree with our change(s), contact us within 30 days of the date of your notice.
  • If you agree with our change(s), correct the copy of your excise tax return that you kept for your records.

How can I find out what caused my tax return to change?

Please contact us at the telephone number listed on t your notice for specific information about your tax return.

What should I do if I disagree with the changes you made?

If you disagree, contact us at the telephone number listed on your notice or respond in writing within 30 days of the date of the notice. If your response provides us with additional information that justifies a reversal of the change, we’ll reverse the change we made to your account. If you agree with the change, please correct your records and no further action is required.

Tips for next year

Consider filing your excise taxes electronically. Filing online can help you to avoid mistakes. Learn more about filing options.

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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