Still not seeing My Account. On the top of my return, on the right are Upgrade, Help Center, Community. It is under State Taxes where they ask about health coverage (Massachusetts). I indicated Medicare, and I got the message that seemed to indicate everything was OK. It wasn't until I went to review my return that they wanted the FEIN. (I had originally clicked the box that I also had private insurance --Tufts Health Plan/Tufts Medicare Complement, but then realized that I probably just needed to enter Medicare. So I deleted private insurance and just indicated Medicare.)
