If I want to start another Turbo Tax Online return, how do I save my first return in my Documents?

you cannot have two returns for the same year in the same account. For a second return, you have to create a second account with a unique user ID. password is up to you. you can use the same e-mail as the first account. 

Online is only good for 1 return per account.  But you can use the same email address for 5 accounts.  You can start another return in TurboTax Online by:

1. Logging out if you are in your account
2. Choose what TurboTax Online product you want to use for the second return
3. Create your account screen
4. Set up a new login for the second return
5. Start working on the new return

You can have up to 5 accounts can be tied to the same email address.

Thank you! This is my first year of using TurboTax online, after years of Desktop dedication. Worked great in the online version, so I was able to doublecheck my work with another run through. 

@VolvoGirl 

Thank you for this bulleted map to follow. It further validated another clear answer I received, and now… finished, filed, and celebrating, I’m sitting back and waiting for a refund. Many thanks for your help.