I'm continuing to dig. In our 2019 taxes, I've entered various out-of-pocket medical expenses, and insurance premiums from Form 1095-A. Those are two different lines in Personal->Deductions & Credits page, under "Medical". In that section, "Medical Expenses" shows all expenses, both out-of-pocket and insurance premiums. The Affordable Care Act (Form 1095-A) line shows zero for both 2018 and 2019, even though I entered the monthly premiums for both years. Why show them as separate line items in the deductions page if you’re going to lump them together and leave the insurance line at zero?
In 2018, we had premiums of $28,488 (1095-A) and expenses of $14,124, total $42,612
In 2019, we had premiums of $26,952 (1095-A) and expenses of $17,220, total $44,172
On our 2018 WI return, line 11 shows a Code 01 (insurance) deduction of $28513, which is $25 more than the 1095-A total. I can't see how that $25 difference might arise, but the WI deduction is approximately ONLY for our premiums.
On the 2019 State return, line 11, I see a Code 01 (insurance) number of $44169, which is within a rounding error (more on that below) of the $44,172 TOTAL medical expense calculation.
Whether you believe that Wisconsin allows deduction of all medical expenses (your claim) or only insurance premiums (our tax advisor’s claim, seemingly backed up by the state document you linked), TurboTax takes one stance in 2018 and another in 2019. They can’t both be correct unless the law changed. Our tax advisor says that hasn’t happened.
And finally, I'm growing increasingly annoyed by TurboTax's inconsistent use of rounding. The 1095-A Form TurboTax produces provides an annual total of monthly premium payments, using full precision for the summation and rounding the annual total to the nearest dollar. However, the annual total that's used to compute total medical expenses, and is passed to the state forms, is the summation of monthy premiums that are rounded BEFORE summation. This makes it difficult to reconcile the math across the entire tax form. While this is all legal, it's also counterproductive.
