TT is calling my pre-tax AFLAC premiums (found in Box 12, code W on my W2) HSA contributions and requiring me to fill in additional information that I don't have. Why?

I checked with our payroll department and Quickbooks and both say the box/code are correct, but TT is giving me problems about it. AFLAC premiums are not HSA contributions - I don't get the money back to spend.