Can you clarify if you are using TurboTax Online or TurboTax Desktop Software? And what version of the program are you using?
I am having the same problem. Turbo tax won't let it efile until a county is selected. The Maryland form specifically says if you live in Baltimore City to leave it blank!
I am using the downloaded deluxe and it has updated.
Hope we get a response!
As you walk through the preparation of your Maryland return, when you get to the screen Tell Us Your Maryland Information, you should choose BALTIMORE CITY for the County or Area. Please see screenshot below for reference. @rmtsc
I am sure my version did not have the Baltimore City option. My version was recently checked for updates. I ended up clicking the Baltimore County and think I did that in a previous year. Not ideal.
Baltimore County and Baltimore city both have the same tax rate, so rest assured that your Maryland tax was calculated correctly. Baltimore City showed as an option for me in both TurboTax Online and TurboTax Desktop Deluxe, so my best guess is that your software didn't have the latest updates.