Get your taxes done using TurboTax

Which TurboTax program are you using?  Your post indicates the TurboTax online editions where there are no e-file fees, federal or state.

Using the TurboTax desktop editions there is a e-file fee for a state tax return of $25.  This fee can be avoided by printing and mailing the tax return.

If you are using the desktop editions, there was a screen for you to pay the state e-file fee either with a credit card or from your federal tax refund.  On the screen you were shown that there was a $40 charge to use this option to pay with the federal tax refund.