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How do I transfer my tax return to myguichet.lu? (Only F100 NOT for F163!)

A few clarifications before transfering your tax return to myguichet :

You will need a Luxtrust product to sign.
Do not modify the tax return or change the name of the document.
Please note! Form 163 (annual statement) cannot be send via myguichet.
You must also submit the PDF containing all your documents (attachments) as well as any additional forms (F190, F700, F152...etc).
At the end of the year, the submission process may be slower due to high traffic on MyGuichet. If you encounter difficulties, we advise you to try again a little later.

Instructions for signing and sending:

First go to the myguichet.lu website and click on "Log in". Then log in with your device and your login.
| Click on "Services".

Then add the PDF of the Form 100 that you have downloaded from taxx.lu. Please note: Form 163 cannot be submitted on MyGuichet!

Upload PDF

Then click on “Add an attachment” to add the PDF of your attachments downloaded from taxx.lu.
| If you need to add any other forms (F190/210, F121, F700...etc) add them by clicking on “Add an annex”.
| Here's an example on how to do it : How do I submit form 190/210 to MyGuichet.lu?

Supporting document/annex

Then click on "Sign" and follow the instructions on the site.
| Your options:
| If you each have a myguichet account, send it once from each account (so that you end up with both signatures)
| Print out the last page of the tax return, sign it together and add it as an attachment directly to myguichet.
| Print out the last page of the tax return, sign it together and send it by post.

Sign

Finally click on "Send".
| The tax office to which you must send it is indicated on the top left-hand corner of the first page of the tax return and on the ‘Result’ page on taxx.lu.
| You can also find your tax office here: Find your tax office

Send

Updated on: 09/04/2026

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