Source date: 2026-06-02
Close Interested in this topic?
Receive an email as soon as an article is published by the editorial team on: Taxes (taxpayer, taxation, etc.)
Close This topic has been added to your alerts
You will receive an email as soon as an article is published by the editorial team on: Taxes (taxpayer, taxation, etc.).
You can unsubscribe at any time in my account > my alerts.
From August 1 to November 30, 2026
2026 Income Tax Return: How to Correct It? Published on June 3, 2026 - Service Public / Directorate of Legal and Administrative Information (Prime Minister)
Do you think you made a mistake on your 2026 income tax return, or forgot to declare an amount? You have the option to correct your return, whether you filed it via a paper form or online. Explanations from Service Public.
You filed an online return
Correction after receiving your tax notice
Your tax notice will be available in your Personal Space between July 24 and July 31, 2026. If you notice an error on this notice, an online correction service is available in your Public Finances space (feature "Access online correction") from early August to late November 2026.
During this period, you can access your return and modify amounts or checked boxes. You will then receive a confirmation email. A new tax notice will be issued after processing the corrective return, and your withholding tax rate will be recalculated.
Once the online correction period has closed
You must file a claim in your Personal Space. This must be done within a strict timeframe. Consult the Service Public fact sheet to learn about the deadlines for various tax claims: Claims and legal appeals regarding taxes.
Certain information cannot be corrected via the online correction service:
-
changes in family status (marriage, civil partnership/PACS, dissolution of PACS, divorce, death);
-
updates to civil status;
-
modification of the designation of a trusted third party, change of address, or addition/modification of a student's address.
You filed a paper return
You can file a claim after receiving your tax notice:
-
online via the secure messaging system in your Public Finances space, click on the "Write" tab > Claim/Dispute/Income Tax;
-
by mail to your public finance center, clearly including the following information: name, first name, and address; tax ID number; handwritten signature; tax concerned; reason for the claim with supporting documents.
If you made a mistake in a declaration to the administration, you benefit from the right to make mistakes. This allows you to rectify your error without being penalized.
See also
-
Income Tax - How to correct your return? Service Public
-
Income Tax - What penalties apply for late filing? Service Public
-
Income Tax - Calculation of tax Service Public
-
Real estate property declaration: When must you provide information in 2026? Service Public
-
Income Tax: The 2026 filing calendar Ministry of Economy
-
I want to correct the return I have already filed. How do I proceed? General Directorate of Public Finance (DGFiP)
Agenda
-
From June 1, 2026 to January 15, 2027 Higher Education How to benefit from Parcoursup mobility aid? Published on May 12, 2026
-
From June 24 to July 21, 2026 Sales What are the dates for the summer 2026 sales? Published on May 7, 2026
-
From June 20, 2025 Sustainable Consumption Extended energy label applied to smartphones and tablets starting June 20 Published on June 12, 2025
Source: Service-Public professionals