The tax card is usually sent to you automatically by post.
If this is not the case, you should contact the competent RTS office.
You can find the different RTS offices here: https://impotsdirects.public.lu/fr/profil/organigramme/rts.html
Here is an example of a tax card :

If this is not the case, you should contact the competent RTS office.
You can find the different RTS offices here: https://impotsdirects.public.lu/fr/profil/organigramme/rts.html
Here is an example of a tax card :

Updated on: 14 / 10 / 2021