I figured out the answer to my question, with no help from the utterly terrible, disappointing and frustrating Turbo Tax phone help or community support. On Feb 13, Turbo Tax and Form 7206 were calculating an incorrect SE health insurance deduction when it reported I could deduct $6400. The correct answer was that I can deduct $0 in my case due to zero profit for the business in Schedule C. So I assume there was a Form 7206 correction pushed between Feb 13 and today in Turbo Tax which corrected this error while also correcting the known error with form 7206 claiming to not be able to be e-filed. You're welcome.