Questions générales

Dernière actualisation le 24 March 2022

How does work? is a website that makes it easy to fill in tax returns (form 100 and 163) in Luxembourg. Thanks to our site, you can fill in your tax return yourself in a simple and quick way.

All you have to do is create an account on our site and fill in the different categories and fields that concern you.
The simulation is completely free of charge. At the end, you will be able to see how much refund you can receive or how much you have to pay and then choose to pay €50 to access your completed tax return.

You can also see your Opti-Score, which will allow you to see at a glance how to reduce your taxes.

If you have any questions about filling in the form, please do not hesitate to contact us by email ( or by instant messaging directly on the website.


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