The day the online portal opens for declaring 2021 taxes is Thursday, April 7, 2022. A tax year in France is considered from January 1, 2021 to December 31, 2021. If you have arrived to France after December 31, 2021, you do not need to worry about declaring taxes for the 2021 season.
If you’re returning your tax declaration by mail, it must be posted by Thursday, May 19, 2022.
If you live in départements (counties) 1-19 and those outside of the French territory your deadline for declaration is Wednesday, May 25, 2022.
If you are in départements (counties) 20-54 your deadline for declaration is Tuesday, May 31, 2022.
If you are in départements (counties) 50-101 and French overseas territories your deadline for declaration is Tuesday, June 7, 2022.