Wow! I don't understand the angst around using the TY2025 software to work on year-end estimates. I think you are confusing forms availability and suitability for filing with having the calculations in place for estimating.
The 2025 tax rates/brackets were finalized in October 2024. The TY2025 released early November had the OBBB changes (SALT changes, enhanced senior deduction) known since early July 2025. There are missing elements of Step-By-Step at this point, but for estimates it is just fine.
If seeking an alternative, or just want verification, I'd recommend Dinkytown and/or Glenn Reeve's spreadsheet, both of which are a lot more up-to-date than TT 2024.
