2025 Income Tax Return: How to Make Corrections

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Did you realize you made a mistake on your 2025 income tax return, or perhaps forgot to declare certain income? Whether you filed online or submitted a paper form, it is still possible to correct your declaration. Here’s how to proceed.

If You Filed Your Return Online

Making Corrections After Receiving Your Tax Notice

Your income tax notice will be available in your personal account on impots.gouv.fr by late July or early August. If you spot an error, a correction tool will be accessible in your personal space from July 30 to December 3, 2025. Just click on “Correct my tax return online.”

During this correction window, you can:

  • Adjust amounts

  • Modify selections made during the initial filing

Once submitted, you’ll receive a confirmation email. A revised tax notice will then be issued, and your withholding tax rate will be updated accordingly.

After the Online Correction Period Ends

If the correction period has passed, you can still submit a formal claim from your personal account. However, this must be done within the statutory time limits. Visit the official page on Tax Appeals and Legal Remedies for full details on deadlines and procedures.

Important: What Cannot Be Corrected Online

Some changes must be handled outside of the online correction tool:

  • Changes in marital or family status (marriage, divorce, civil union registration or termination, death)

  • Civil status updates

  • Changes related to a trusted third party or address updates, including those for dependent students

If You Filed a Paper Tax Return

Once you receive your tax notice, you can submit a correction request either:

  • Online, through your personal space on impots.gouv.fr, or

  • By mail, addressed to your local public finance office

Be sure to include:

  • Your full name and address

  • Your tax identification number

  • Your handwritten signature

  • The type of tax concerned

  • A clear explanation and supporting documents

Reminder: You Have the Right to Make Mistakes

If your mistake was made in good faith, you benefit from the “right to error”. This means you can correct your tax return without automatically facing penalties.