How can I start a return for my wife

[L-Argee]

How can I start a return for a different person

[VolvoGirl]

Aren't you filling a Joint return?  Why?  Joint is almost always better than separate.

Online is only good for 1 return per account.  But you can use the same email address for 5 accounts.   How to start another return in the Online version

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