Your tax return guide in Luxembourg

Your Questions
Our Answers

Can't find what you're looking for? Contact our customer support

General

How can I change my email address?

You have to log into your taxx.lu account, then go to "Settings" and "Change email address".

General

How do I send in my tax return (form 100)?

You have several options.

General

What is taxx.lu ?

taxx.lu is a website that makes it easy to fill in tax returns (forms 100, 163 and 190) in Luxembourg. Thanks to our site, you can fill in your tax return yourself in a simple and quick way.

General

After the payment, how long does it take until the tax return is available?

General

How can I receive my tax card?

The tax deduction form is sent electronically to your employer.

General

What is the deadline for sending in my tax return?

Tax return 2023 :
  • You have until 31 December 2024 to submit your tax return or annual statement.

For previous tax returns :
  • It is no longer possible to submit them unless you are obliged to do so!

If you are obliged to do so, you can still file your 2018, 2019, 2020, 2021 and 2022 returns on taxx.lu.

General

Who has to make a tax return in Luxembourg?

ven if the tax return is not compulsory, it may be advantageous to do so in order to benefit from a tax refund. To find out whether or not you are entitled to a tax refund, simply do a free simulation on taxx.lu!

General

Which form should I submit between 100 and 163?

Important! The taxx.lu system will indicate (after payment) which form you need to submit for your tax situation. Only one of the two forms needs to be sent in!

Form 163 and Form 100 are tax return documents designed to declare your income and deductible expenses. Both forms allow you to claim refunds or settle outstanding tax dues. Despite their differences, submitting either Form 163 or Form 100 won't alter your ultimate tax outcome.

It's vital to note the distinctions:
  • Form 163: A concise 6-page version, labeled an 'annual statement' (French: décompte annuel).
  • Form 100: A 20-page document called 'annual tax return' (French: déclaration d'impôt).

Choosing the right form hinges on the complexity of your situation.

General

How do I apply for collective taxation if one is a resident taxpayer and the other a non-resident?

If one spouse is a resident taxpayer while the other is a non-resident, they may file a joint return only if one specific condition is met.

General

How can I receive my tax statement electronically?

Since 21 December 2020, you have been able to retrieve certain types of mail sent by the tax authorities via MyGuichet. 

General