You're seeing this in your state return, correct? Are you entering the county name manually? If so, see if there's a drop-down menu of counties and select the county from there before proceeding.
It's a shot in the dark, but may work. Hope so.
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
