@ ashland_marsh-fr
YES there was an update that occured, after which I could e-file. Prior to that I was getting a message different from what you are describing. It was something like "returns with a 7206 cannot be e-filed." I never received the message you describe.
We do NOT have Long Term Care Insurance. Our forms 7206 (two, one each for 2 schedule Cs) has entries in all lines 1 - 14 EXCEPT lines 2, 9, 11, 12.
I am on a PC, Windows 10. Thre were almost daily updates when the problem described above was first occuring.
Good luck on trouble-shooting. I think you are on the correct path to identify what is the same / different for those for whom it works vs. doesn't work. It's unfortunate that TT is seemingly not helpful in this endeavor. Sometimes it helps to keep calling or emailing until you get someone who listens and is willing to help. Different reps have different skill levels.
