Wheres my fedex account number?

so i want to send my macbook in to apple for repair. i got the box packaged it up and now i called fedex to arrange a pickup and they said i needed a fedex account, i dont use fed ex so i dont need an account which requires credit card info. my mom said that when she last sent a computer in apple provided a account number, im now on the phone with apple and ive gone through one advisor and a senior advisor whos now connecting me to another person. i found the account number but it says s************ which is no help. any ideas?