BTW @SteamTrain and @rjs No, it is NOT only in Supporting Details lists where this formatting issue shows up. There are other places where direct entries in forms also exhibit this same problem. However, this is not consistent either, i.e., this problem does NOT show up universally for all numeric input everywhere in Turbotax. This indicates that internally, Turbotax software has more than one piece of code that parses and interprets numeric input data. Some such pieces of code interpret input according to the US format (disregarding the OS regional settings), and some of them interpret their input according to the OS regional settings. Naturally, the output is always in the US format, for obvious reasons.
