I don't think DaveF's explanation turned out to be correct (although it was a reasonable inference based on the information available at the time). The problem was that Turbo Tax had not yet finished this part of its 2025 software as of Jan. 14, 2026. Once Turbo Tax updated it, the software worked the same as in 2024. So it was not the OBBBA that was driving the $500 problem.
