I just ran across this also. This is most certainly different than how TT 2019 handled it. In TT 2019, each individual transaction (trade) was carried to the correct number of cents and matched my 1099-Bs perfectly, rounding only the total to the nearest dollar.
TT 2020 handles this differently at the transaction level, rounding each individual transaction to the nearest dollar and then summing the rounded numbers to show the overall gain/loss. Help! For me, it's resulting in a higher total that could lead to additional taxes.
Not cool.
