can I start a different tax account for another family member on my account

[Sakimike]

example. My mother needs to do her taxes, and I need to do mine. She doesn't have an account.

[xmasbaby0]

When you use online TurboTax software 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, the second one overwrites the first return and it is lost forever.  

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

[VolvoGirl]

You can use the same email for 5 accounts and returns.

You can start another return in TurboTax Online by:
Logging out if you are in your account
Choose what TurboTax Online product you want to use for the second return
https://turbotax.intuit.com/personal-taxes/compare/online

Create your account screen
Set up a new login for the second return
Start working on the new return