I'm going through the HSA section of TurboTax now and when i indicated that I had HSA coverage for just Sept-Dec it is saying that my maximum contribution limit is $3,450. I believe that it is reaching that conclusion based on the "last month rule". But my understanding is that rule only applies if I continue to be on a HDHP for the entirety of 2019, which I'm not. Thus, it seems to me that TurboTax is not accurately calculating my maximum contribution and thus not automatically taxing my excess contribution.
