.....not sure why the MD Info Worksheet wouldn't let you enter anything in there. My NC form does, but then, I haven't even started the filing process to select E- vs Mail filing yet.
Can always get help from Customer Support if you can't find the spot (I don't have MD software...if it proceeds differently, I can't check it):
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
