Deductions & credits

@xmasbaby0  wrote: "...the 2020 software you are trying to use is not necessarily going to give you accurate results."

Wouldn't the TT 2020 software purchased 10-18-23 via an Amazon download be 'accurate' as of all tax code revisions up to (or near) that date? Other than TT having applied IRS updates if issued in 2021 for TY 2020, what could make that release of TT 2020 less accurate than it was in late 2023? Does TT make a habit of issuing a final update to retiring tax year software that purposely shuttles it?