I sent a tweet to Turbotax. Same question as yours - about a week ago. They said they had taken Maryland's released forms, integrated them into the software, and sent it back to the state of Maryland for review and signoff. It would appear it is hung up in the stage where the state reviews the electronic forms from Turbotax. So, the date that Maryland released its paper forms is not the whole story, as it is followed by another review cycle. Regardless of the reason why, we are all sitting here waiting. It is unbelievable that (for whatever reason) we are sitting here unable to complete state taxes for MD Form 510.
