Hello I started working in Luxembourg last year I am currently doing my taxes on guichet.luto further proceed I should put a serial number of 11 numbers called "file number" unfortunately I can’t find the number. I thought it was my security social number, but no. Any idea where to find it? ty

https://old.reddit.com/r/Luxembourg/comments/1dyfecl/question_regarding_guichetlu/

Posted by Cute-Cricket3103

3 Comments

  1. It is a number that the ACD (tax administration) assigns you. You can find it on the letter they send you in which they tell xou that you need to do your tax declaration. Or they can probably tell you the number if you ask them

  2. If you are declaring for the first time, you’ll be assigned the number when you submit.
    Might be that you have to do it the old-fashioned way the first time and not via myguichet if myguichet will not let you submit without it. I say this as I seem to have a recollection that it is an optional piece of data.