Can my adult son use my account to file his return?

[PatriciaR]

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/