Correcting Your Tax Return

If you notice an error in your tax return after submission (forgotten income, incorrect amount, missing information), you can correct it online within a certain period, or via written letter after this period ends.

This page explains how to make this correction, what information to provide, and offers a ready-to-use letter template, plus a tool to automatically generate your personalized letter.

When should you write this letter?

• You forgot to declare certain income;
• You noticed an error in a declared amount;
• You forgot to mention a tax reduction or exemption you're entitled to;
• The online correction period has ended.

In all these cases, a written letter remains a reliable way to correct your return.

Required information to include

• Your first and last name and tax number;
• The tax year concerned;
• A precise description of the error and correction requested;
• Supporting documents for your correction.

The more detailed and well-documented the correction, the faster it will be processed.

Official letter template

Important note: the letter sent to the tax office must be written in French, as it is a French administration. Below is a template you can use as a basis.

[First name LAST NAME]
[Full address]
[Tax number]

Tax Office for Individuals of [City]
[Office address]

Written in [City], on [Date]

Subject: Correction of my income tax return

Dear Sir/Madam,

I wish to correct my [year] income tax return concerning [description of the error].

[...]

→ The complete letter, tailored precisely to your situation and ready to send, is generated automatically in 3 minutes using the tool above.

Frequently Asked Questions

Until when can I correct online?

Usually until mid-December of the same year, after which a written letter must be used.

What's the general deadline for correction?

Until the end of the second year following the declaration year.

Does correction affect my tax amount?

Yes, it may increase or decrease the amount owed depending on the nature of the correction.

What if I forgot a tax reduction I'm entitled to?

You can claim it via a corrective claim, with any difference refunded if applicable.

Can I correct multiple times?

Yes, several corrections can be submitted if needed, within legal deadlines.