If already activated and operating, 2021 should continue to work just fine. Generally, it is just for new installations on new computers that won't work . (or full re-installation on the same computer)
My 2020 desktop Premier is still working perfectly.
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A few folks with already working/installed desktop software of any year, have reported they get an unusual prompt to re-enter their code....for some unknown reason....if that kind of event happens after 2021 is taken down, then the software will probably stop working, even if it was already installed and working prior to that. Not sure what causes that, but it's never happened to me on my W10 or W11 computers.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
