There is a 39.99 service fee if you choose to pay the TurboTax fees out of the Federal refund.
If you remove that and pay upfront with credit/debit card, you will avoid that fee. Or you can use a prepaid debit card you can buy in a store for a few bucks.
Here's how to remove it, depending on your location:
Non-California filers:
https://ttlc.intuit.com/questions/1900517-how-do-i-remove-the-refund-processing-service
California filers (where it is in the "Premium Services" bundle) :
https://ttlc.intuit.com/questions/2154391-how-do-i-remove-the-premium-services-fee
