I was given a service code to process my taxes for free, why am I still being charged?

No one in the user forum can resolve a billing issue.  If you have a question about your TurboTax fees or billing, make sure you use the word “billing” in your request for help.  Do not use the word “refund.”

https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number

Did you enter the code?  Maybe it is just for federal.  Did you do a state return?

How to review your fees

https://ttlc.intuit.com/community/charges-and-fees/help/how-do-i-review-my-fees-in-turbotax-online/00/26353