Income Tax - How to correct your return?

Verified 05 June 2026 - Public Service / Directorate of Legal and Administrative Information (Prime Minister)

In case of error or omission, you can correct your tax return. Terms and conditions vary depending on whether you report online or on a paper form.

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You reported your income online

The correction depends on the declaration concerned.

This is the 2026 income tax return for 2025

The approach depends on the date of correction.

Before the deadline for filing your return

The 2026 return of 2025 income is complete.

The 2027 2026 income tax return will begin in april 2027.

After the reporting deadline

The approach depends on the date of correction.

Until the closure of the online reporting service

The online reporting service is open.

You can correct your statement.

Taxes: access your Public Finance area

Warning  

If you file your return, and not just a correction, after the deadline for filing the return online, you risk a penalty for late declaration.

Between August and December 2026
General case

In the event of a finding of an error after you receive your tax notice, it is possible to correct your return online, in your Public Finance area on the tax website.

Taxes: access your Public Finance area

You can also use this service if you have benefited from a automatic declaration.

Please note

If you have declared your income online on the mobile application "impots.gouv", you can correct your declaration on smartphone or tablet.

You can correct the amounts entered in the boxes, check or uncheck the incorrect boxes.

A confirmation email is sent to you at the end of the procedure.

You receive a new tax notice.

Then, your withholding tax rate is updated.

Warning  

As with any statement, the administration may, if necessary, ask you for clarification, and possibly refuse the requested correction.

You cannot correct some errors through the online correction service.

This is the case in particular for the following:

  • Change in family status (marriage, Civil partnerships, divorce, death, etc.)
  • Update of the civil status
  • Change of address.

You must request these changes using your secure messaging from your Private Area.

Self-employed workers

In the event of a finding of an error after you receive your tax notice, it is possible to correct your return online, in your Public Finance area on the tax website.

Taxes: access your Public Finance area

As a self-employed worker (tradesman, practitioner or medical assistant and liberal profession), you can proceed to the correction of your social and tax tax returns.

The changes made are automatically transmitted to Urssaf(and the liberal professions pension fund if you are affiliated with it).

The amount of your social contributions is adjusted.

You can correct the amounts entered in the boxes, check or uncheck the incorrect boxes.

A confirmation email is sent to you at the end of the procedure.

You receive a new tax notice.

Then, your withholding tax rate is updated.

Warning  

As with any statement, the administration may, if necessary, ask you for clarification and possibly refuse the requested correction.

You cannot correct some errors through the online correction service.

This is the case in particular for the following:

  • Change in family status (marriage, Civil partnerships, divorce, death, etc.)
  • Update of the civil status
  • Change of address.

You must request these changes using your secure messaging from your Private Area.

From December 2026

After the end of the correction period of the online declaration, you must lodge a complaint from your Public Finance area.

Taxes: access your Public Finance area

Prepare a folder containing the information to be provided:

  • Your name and address
  • Name and characteristic of the tax concerned
  • Reasons for the claim
  • Supporting documents (as the case may be, a copy of the tax notice, a copy of the assessment notice, a document justifying the amount of the withholding tax or the payment in the case of tax collected by way of withholding tax).
This is another tax return

If you have not made the correction in time, you can file a complaint.

You can do it until december 31, 2026 for the 2024 income tax return.

You can file your claim online from your Public Finance area.

Taxes: access your Public Finance area

Prepare a folder containing the information to be provided:

  • Your name and address
  • Name and characteristic of the tax concerned
  • Reasons for the claim
  • Supporting documents (as the case may be, a copy of the tax notice, a copy of the assessment notice, a document justifying the amount of the withholding tax or the payment in the case of tax collected by way of withholding tax).

You reported your income on paper

This is the 2026 income tax return for 2025
Before the deadline for filing the declaration

The 2026 return of 2025 income is complete.

The 2027 2026 income tax return will begin in april 2027.

After the deadline for filing the declaration

After receiving your tax notice, you can file a complaint.

Prepare a folder containing the information to be provided:

  • Your name and address
  • Name and characteristic of the tax concerned
  • Reasons for the claim
  • Supporting documents (as the case may be, a copy of the tax notice, a copy of the assessment notice, a document justifying the amount of the withholding tax or the payment in the case of tax collected by way of withholding tax).

You can make your claim by one of the following means:

  • Online
  • By post
  • By phone
  • At the counter.

You can make your claim online from your Public Finance area:

Taxes: access your Public Finance area

Alternatively, you can contact your public finance center.

This is another tax return

If you have not made the correction in time, you can file a complaint.

You can do it until december 31, 2026 for the 2024 income tax return.

Prepare a folder containing the information to be provided:

  • Your name and address
  • Name and characteristic of the tax concerned
  • Reasons for the claim
  • Supporting documents (as the case may be, a copy of the tax notice, a copy of the assessment notice, a document justifying the amount of the withholding tax or the payment in the case of tax collected by way of withholding tax).

You can make your claim by one of the following means:

  • Online
  • By post
  • By phone
  • At the counter.

You can make your claim online from your Public Finance area:

Taxes: access your Public Finance area

Alternatively, you can contact your public finance center.

Who can help me?

Find who can answer your questions in your region

  • For general information

    By phone:

    0809,401,401

    Monday to Friday from 8:30 am to 7 pm, excluding public holidays.

    Free service + price call

  • To contact the local service managing your file

    Tax department (treasury, tax department...))