As of 3/2/2021 in TurboTax Premier I see the correct amounts to the cents in the lowest level detail entries compared with those in the corresponding written Form 8949. However, I have seen several rounding errors (rounding down when it should be rounded up and vice versa) in the next level up. This has caused nearly a $5 discrepancy in the summary values reported in TurboTax versus the summary values reported on the written 1099-B.
