Each TurboTax Online
account is for one federal tax return.
However, you can create another TurboTax Online account to file another
return using the same email address but a
different login/User ID for each account. If you are preparing
multiple tax returns, a CD/Download may
be more economical. See the info below for creating another
online account or for purchasing a CD/Download:
Create another TurboTax
Online account:
https://ttlc.intuit.com/replies/3288574
CD/Download products:
If you are planning
to prepare more than one return, you may want to consider purchasing a
TurboTax CD/Download as you get 5 free
federal e-files with the product.
Here is a link to the CD/Download products: https://turbotax.intuit.com/personal-taxes/cd-download/