Hi there @ibrahimresmi,
thanks for reaching out, i hope you don't mind me replying in English !
For the full and correct steps on how to claim your Premium for Students, please make sure to check out this help page.
It contains all the steps needed in order to complete and get the full benefits on this specific subscritpion.
In order to receive the full access and discount you'll have to provide all the info and documnets you're asked for.
However, if you're getting any sort of error message please provide it here and i'll be more than happy to help.
Keep me posted.