Okay, the HSA issue was my misunderstanding as I compared 2018/2019 returns. The deduction is indirect (a subtraction from schedule 1 line 36) in the 2018 1040 shown directly on line 8a in the 2019 1040.
We called the Wisconsin Dept of Revenue and were told that we can deduct ONLY approved health and dental insurance premiums. Uncovered medical expenses (ex: out-of-pocket, co-insurance) are not deductible. Those expenses (which we entered to test against the 7.5% threshold for total health care costs) were not deducted by TurboTax in our 2018 return, but are being deducted in our 2019 return.
If you read Code 01 on page 18 of the WI tax instructions you linked, you'll see that only insurance premiums may be deducted, in agreement with what we were told by WI-DOR on the phone.
