If you chose to pay TurboTax fees out of your Federal refund, there is a 39.99 service fee for that option (44.99 for California filers.)
Here are some typical fees in Online Deluxe:
Deluxe Federal return 59.99
State return 44.99
Option to pay fees out of the Federal refund: 39.99 (or 44.99 for California)
Plus possible sales taxes.