I'm trying to file my taxes but it keeps pulling up someone else's name. How can I start my taxes

When you use Online TurboTax, you get one return per fee.  Each return needs its own account and user ID.   If you use the same account and user ID for a second return, you overwrite the first one and lose it forever.

https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-online/00/25596

If you are using TurboTax Online, and you confirmed that you logged in using your userid and password, then your credentials may have been compromised and someone else may be using your account.

Please use the phone number in this article to contact TurboTax support for assistance.

@jkmiller333