Sorry for not replying sooner, I had to go out of town unexpectedly, and I'm now filing my taxes late.
You said, "On the 1095-A, column B is the Monthly Premium Amount of Second Lowest Cost Silver Plan (SLCSP), which is never $0 as it represents a premium amount that would have been charged".
On my form, it is $0 for all months. The cover letter with the form mentions this might happen, and points to the Instructions for Form 8962. That document, as well as the on-screen help in Turbo Tax, say that you can get these figures from HealthCare.gov/Tax-Tool/. However, that tool tells me not to check the box for months where I was eligible for other healthcare. If I don't check the box, that tool reports 0. If I do check the box, I get a non-zero SLCSP amount; when I enter those values into Turbo Tax, it tells me I am eligible for the Premium Tax Credit.
BUT - I was eligible for health insurance through my employer, I just chose to use the marketplace because my employer's plans don't cover any of my doctors. I think that means I'm NOT eligible for the PTC, correct? If so, then I need to leave the SLCSP values as 0, which I cannot do (TurboTax reports an error). Should I just remove the form 1095-A from TurboTax? I can find no place in TT to tell it I was eligible for MEC through my employer.
