The only time you pay a separate fee for e-filing is when e-filing a state tax return using Turbotax Desktop version installed on your own Mac or PC. In this case, you can call customer service for a refund.
In all other cases (Federal return with desktop version, and both Federal and State versions with Turbotax Online) e-filing is included in the base fee for tax prep and you weren't charged extra to e-file.
