I wish to file a return for my 17 year old daughter. How do I do that without incurring additional Turbotax fees? I am also filing for myself.

[VolvoGirl]

She can probably use the Free Edition.  Online is only good for 1 return.  Do NOT use your account!  But you can use the same email address for 5 accounts.   How to start another return in the Online version https://ttlc.intuit.com/replies/3288574 

[VolvoGirl]

Or to do more than 1 return you should consider using the Desktop CD/Download program.  It can do unlimited returns and has several other advantages and features over the online version.  If you haven't paid for online you can switch to the Desktop program.