Online is only good for 1 return. But you can use the same email address for 5 accounts. How to start another return in the Online version
https://ttlc.intuit.com/replies/3288574 Or There is also The Turbo Tax Freedom website which is free for federal and state. And has more forms than the Federal Free Edition, like the full 1040 return and Schedules A, B, C , D, E, F, EIC, H, K-1, SE, etc.
To qualify for the Tax Freedom website you just need to meet one of these 3 things
AGI $33,000 or less
Active duty military with AGI of $64,000 or less
OR qualify for EIC (earned income credit)
In order to use the Tax Freedom Edition, you have to start it at a special website:
http://turbotax.intuit.com/taxfreedom/Do not sign in at the top. Use the bottom I QUALIFY START NOW
and set up a new account or it will take you back to regular Turbo Tax.
How to switch to Tax Freedom
https://ttlc.intuit.com/replies/3491786
