Where was it purchased from? Did you download and install?? Did you receive an activation serial code??? What version of Sound Forge???? What is "Magic pc tuning 2021"?????? You are not stating much information in order to help you. Please read the sticky at the top of the forum page.
btw, welcome to the Magix Sound Forge users forum @vil-l.
I bought it from it from Sweet Water, on 12/23/2020, but the activation & registration codes are not working The activation code, specfically doesn't work for the Magic PC tuning 2021.