First go to the myguichet.lu website and click on "Log in". Then log in with your device and your login.
Click on "Submit a completed document" at the top.
Then add your the PDF of form 100 and click "Next".
Then click on "Add a supporting document" to add the PDF of your attachments/annexes and then click on "Sign" and follow the instructions on the site. Finally click on "Send".
Click on "Submit a completed document" at the top.
Then add your the PDF of form 100 and click "Next".
Then click on "Add a supporting document" to add the PDF of your attachments/annexes and then click on "Sign" and follow the instructions on the site. Finally click on "Send".
Updated on: 01 / 04 / 2020