How can I file my friend's taxes for them?

[rjs]

A TurboTax Online account can only be used for one tax return. To file a tax return for someone else you have to use a separate user ID, and pay separately. You cannot prepare another tax return with the same user ID that you used for your own return.

See the following FAQ for instructions to start another tax return with a new user ID.

How do I start another return in TurboTax Online?

[VolvoGirl]

The Desktop CD/Download program can do unlimited returns and efile 5.   Buy the personal Desktop CD/Download programs here

https://turbotax.intuit.com/personal-taxes/cd-download/