Get your taxes done using TurboTax

So, just to clarify, I could buy the CD at Costco and do both tax returns with no additional charge and mailing in both State tax returns.  Or buy the disk and pay 19.99 or 24.99 each for my mom and I to e-file?  It does allow multiple federal returns and state returns, too, it's just each state return requires the fee unless mailed?