If I buy this software (Deluxe) to do my taxes, can I also use it to do my adult children's tax returns?

[jerry2000 · Accepted solution]

No, you can not.
When you use Turbotax Online version, you can prepare only one return per account/payment. This Turbotax help topic tells you how to start another return:
https://ttlc.intuit.com/questions/1894512-how-do-i-start-a-second-return-in-turbotax-online

That is a fundamental difference between the Turbotax Online version, which you access through a web browser, and the CD/Desktop version which installs and runs on your home computer.
With the CD/Desktop version, you can prepare as many returns as you wish just for the price of the box.

[Critter]

The 2016 Desktop software (CD/Download) can be purchased from TurboTax at the following link :

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

For 2016, all the downloaded programs will handle all tax forms.

Basic doesn’t include a state program (it is an extra cost) however the Deluxe version or better does include one state program.

You can complete an unlimited number of returns however you can only efile up to 5 federal returns for free and there is an extra cost to efile each state return (but mailing them is free).