Dernière actualisation le 18 January 2022
What is the deadline for sending in my tax return?
Form 100 :
Tax Authorities asks you to send in your return by March 31.
If you send it after 30 June, it should in principle be accepted.
However, if you file late (i.e. after March 31) it may take longer to process your tax return.
Non-resident taxpayers, married before January 1 of the tax year, who wish to change their tax class are obliged to send their return before March 31, otherwise they will automatically be taxed in tax class 1.
Form 163 :
The deadline is 31 December and in principle the Tax Authorities does not accept forms after that date.