There are two separate items here:
One is utilizing the state tax preparation program provided by TurboTax. A state tax preparation program (if not included in your original federal purchase) is currently $39.99/state. The second is the actual e-filing of each state return.
For the actual e-filing of a state return: If you are using TurboTax Online (the web-based platform), e-filing fees are included in the purchase of the state tax preparation program.
If you are using TurboTax Desktop platform (CD/download), there will be an additional charge to e-file a state tax return. Currently, that e-filing fee is $19.99 per e-file. All prices are subject to change at any time and without prior notice.