When I was about to file my return, it said was going to charge an extra $40 fee. But didn't say what that fee was for. Does anyone know?

[xmasbaby0]

If your refund is enough to cover your TurboTax fees PLUS the extra “refund processing” fee of $40 ($45 in CA) and your forms are ready then when you are in the FILE section you can choose to have your fees deducted from your federal refund by a third party bank, who will take out your fees and send you the rest of your refund after the IRS issues the refund. 

What is Refund Processing Service?

How can I see my TurboTax  fees?   

https://ttlc.intuit.com/questions/2565973-how-do-i-review-my-fees-in-turbotax-online 

[VolvoGirl]

Well a state return is a separate $39.  Then if you want the fees deducted from your federal refund the is an Extra $40 Refund Processing Service charge (45 in California). Which you can avoid by paying upfront with a credit card.

How to review your fees

https://ttlc.intuit.com/community/charges-and-fees/help/how-do-i-review-my-fees-in-turbotax-online/0...

For help with fees

https://ttlc.intuit.com/community/charges-and-fees/help/what-can-i-do-to-reduce-my-fees/00/26051

Remove Pay with Refund fee

https://ttlc.intuit.com/community/downgrading/help/how-do-i-remove-pay-with-my-refund-fees-in-turbot...