This form and the Maryland state program have been a real problem thus far this year. Just a short time ago, TurboTax Expert @AmyC shared some insight from other users that may help you out. Additionally, you can sign up for email notification of when this issue has been resolved.
See the final answer posted in this thread.
*** 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.***
