If you are using TurboTax Online (website), you can only do this if you create a new account for them. You can go to My Account and then Save & Sign Out. From the sign in screen, click on Create new account. You can use the same e-mail address, but you will need a different username.
If you use TurboTax Desktop (CD/Download product), you can click on the File menu and then New tax return.
Unless the other people qualify for the Federal free version of
TurboTax Online, the desktop version may be more cost effective.
TurboTax Online would require you to pay for each return completed.
TurboTax Desktop can prepare and unlimited number of returns and e-file
up to 5 returns.
Please refer to the link below to purchase TurboTax Desktop.
https://turbotax.intuit.com/personal-taxes/cd-download/
