A:AnswerUsually you get an email with the code from Best Buy. Check your spam email In case the email went there. After you get the code you have to go to apple store and redeem it there.
A:Answerits ok. but when you activate it with the confirmation code, just use it on the correct email address. provided that its never used Apple Muisc before.
A:AnswerAre you referring to this link apple.co/BBYredeem ? It should redirect you to Apple Music and ask to scan or enter the code in manually. You can do this also by going to Apple store clicking your name at the top right you will see redeem gift card or code and just paste the code in. It can be done in iTunes or music as well