i'm trying to build my credit as much as i can and i have a few questions. a couple of years ago my sister opened up a credit card with best buy. i wanted to buy a few electronics and i eventually asked her to put me under the account so that i could make my own payments and everything. she's the main account holder that initially opened up the account and so when they added me as an authorized user i believe they MAY have asked for my social security and i also have my own card. today i have a few of my own credit cards and i manage them pretty well, while my sister pretty much has her best buy card maxed out and never makes a payment on time. recently i got my credit score/information and the best buy account came up into that information. i was wondering if it's going to hurt my credit score MORE if i have her remove me from the account while it is maxed out..or if i should stay on the account until she pays it off..which may possibly take YEARS at the rate we're at now. can any of you credit experts offer some advice my way?