The Online version is only good
for 1 return. But you can use the same email address for 5 accounts. To do another return you have to set up a new
account and new user name and pay any fees again.
How to start another return in
the Online version: https://ttlc.intuit.com/replies/3288574
Your dependents can file their own returns to possibly get back all of their withholding taxes (but NOT Social Security nor Medicare taxes); just be sure to indicate that
they are claimed as a dependent by someone else (you) when you get to that point in the program.
Please see screenshot below:
