TurboTax does not give you a service code just because you want one. They give those if you have experienced specific types of problems using the program.
If you qualify to use it, there is another full-featured free version of the software:
Try Free File:
You qualify if your income was $36,000 or less, or $69,000 or less if active duty military, or if you qualify for Earned Income Credit
If you switch to Free File you must create a new account and new user ID.
Right now you are posting from one of the most expensive online versions.
How to see your fees
For help with fees
How to downgrade to a lower version :
How to remove the Pay from your Refund fee