Yes. In the Online version you need to set up separate accounts. 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...
The Desktop CD/Download program can do unlimited returns. Start a new return, go to File-New. Be sure to save frequently, go up to File-Save or Save As. Save each return with a name you can tell apart from another one. Especially if another return has the same name or initial. Like a father and son. Or if you have the same name the second return might overwrite the first one.
