aiiiiii_shaaaaa Said:
"apple id on iTunes Store: whenever I want to update an app on my Mac book pro it would ask me to sign to iTunes Store but with my moms Apple ID because it used be her laptop only for a week and I signed from her iTunes Store what do I do to change that username because I would tap on but it's locked on I can't change it"
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Contact Apple Support:
Typically, you have to wait 90 days to assign a new Apple Account to it.
So, contact Apple Support, and see if this can be worked around. Have your mother call Apple, and deauthorize it. Then, have her request that it be transferred over to your Apple Account.
Go Here: Contacting Apple Support