I started my HSA and high-deductible health plan in 2019. My HSA account allowed me to "jumpstart" my balance by making a contribution from my checking account (post-tax), and applying it to the 2018 year. In TurboTax, when entering this information (and noting that I did not have an HSA in 2018) it appears to instead be applying an additional 6% tax on that contribution. This seems very strange, since I already paid taxes on the money when it was counted as income. Now when putting it into my HSA, I would expect to get a tax credit, or at the very least not be taxed again.
