It depends.
If you are using TurboTax Online, please visit the following link: Compare online products and select "State additional" for the current price.
If you are using TurboTax CD/Download, please visit the following link: Compare CD/download products and select "State additional" or "1 state download" for the current price.
To review your fees, please review the following link: How
do I review my fees in TurboTax Online?