I was able to eventually debug my issue:
I had sold my home at a profit, but because I had to allocate expenses to the land I had the land sold at a loss.
I was able to fix the error by increasing the sale price of the land by the amount of sale expenses allocated to the land so that it didn't sell at a loss (and decrease the sale price of the building portion by the same amount).
This didn't end up changing any of my ultimate tax situation, but did fix TurboTax complaining.
TurboTax should resolve this issue though. @DaveF1006 do you see anything wrong with my solution?
