Information For...

For you and your family
Standard mileage and other information

Forms and Instructions

Individual Tax Return
Instructions for Form 1040
Request for Taxpayer Identification Number (TIN) and Certification
Request for Transcript of Tax Return


Employee's Withholding Allowance Certificate
Employer's Quarterly Federal Tax Return
Employers engaged in a trade or business who pay compensation
Installment Agreement Request

Popular For Tax Pros

Amend/Fix Return
Apply for Power of Attorney
Apply for an ITIN
Rules Governing Practice before IRS

Understanding Your CP124 Notice

We made changes to your excise tax return because we believe there was a miscalculation. As a result of these changes, there is a balance due of less than $1.

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.
  • You don’t have to pay if you owe less than $1.

Answers to common questions

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

Please contact us at the toll free number listed on the top right corner of 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 toll free number listed on the top right corner of 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 and to find credits and deductions for which you may qualify. Learn more about e-file.

Printable samples of this notice (PDF)

How to get help