Using the TurboTax online editions only one federal tax return can be filed. Meaning e-fling or printing the same federal tax return. This is also true for any state tax returns being filed using the online editions.
To complete and file another tax return for someone else you would need to create a new online account with a new User ID.
If you want to file multiple federal and state tax returns for different individuals use the desktop editions - https://turbotax.intuit.com/personal-taxes/cd-download/
