Information gathered by Intuit

If you used the desktop CD/Download editions installed on your computer, the only copy of your tax data file and any PDF's will be on the computer where the return was created.  TurboTax does not store online any returns completed using the desktop editions.

When you use the CD/download the tax files are only stored on your own hard drive.  No one's tax returns are going to be stored online with TurboTax if you prepare other family member's returns using your PC.   Their returns will only be stored on YOUR hard drive or any back up device you use like a flash drive.

Make sure to give your families copies of their completed returns (printed or PDF).  

Possibly Intuit does not keep complete records of each return but I am aware that they gather whats called non identifier information. For me that is not acceptable. We only need read the long privacy and user agreements. . When I purchase a product I expect total anonymity, no one needs to know anything about me, my ip address, my phone number and on and on. The new rules to validate the product will keep me from ever buying this product again, very disappointed as a long time user.

And no offense but when answers to questions come from other users and not Intuit employees I am very skeptical of the accuracy. You're providing a service for Intuit at no cost to them and also at no liability to them if your responses are not accurate.