Can I use my turbo tax online to help my kids file their accounts too? How many can I file with one turbo tax

[DoninGA]

The TurboTax online editions can only be used for one tax return per account and User ID.  If you want to start another tax return using the online editions you will need to create a new account with a new User ID.

[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.    You can use the same email for up to five accounts.

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