Yes, you can use the TurboTax desktop CD/Download editions installed on your computer to complete a tax return for anyone. Provided you do not charge a fee for completing the tax return.
Yes. Are you using the Online browser version or the Desktop CD/Download program?
Online is only good for 1 return per account. But you can use the same email address for 5 accounts. How to start another return in the Online version
Thats why if you need to do more than 1 return we recommend you buy the Desktop CD/Download program. It can do unlimited returns and efile 5 for free. And you can buy a lower version. All the Desktop programs have the same forms. You just get more help and guidance in the higher versions.
Or if you have the Desktop CD/Download program installed on your computer you can do multiple returns. Go up to File-New.