Get your taxes done using TurboTax

And.....all of the updates and the state software are only via download.   A thumb drive or SD card will not help with any of that after the initial installation of the program.  Perhaps you could prepare your friend's return for him on your own computer, or allow your friend to use one of your computers and encrypt his file so you will not be able to see it.

**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**