The Desktop CD/Download program can do unlimited returns and efile 5. The Online web versions are only 1 return. Which are you using?
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...
