Sounds like the person helping you didn't really know what they are talking about. The guidance on this hasn't changed in 2 years. For 2018 and 2019 Turbotax referred you to an IRS worksheet to calculate your liability here, which while I scratched my head as to why I'm paying Turbotax if I'm doing this on my own, you knew you were getting the right number. For 2020 they put in this oversimplified and broken calculation.
Not very reassuring that it "may" get resolved before tax season. Does that mean I need to make alternate plans to file my taxes? Or that I need to ask the IRS for an extension because Turbotax is broken? This seems to be a major bug that needs to get fixed quickly.
