ALL installed APPS since I am using TT are in my Applications folder, do I need to keep them all?

[Mike9241]

if you are asking about your Turbotax desktop apps only the current year and the 3 prior years will work. so 2020 and earlier can be uninstalled. Hopefully you made PDFs of those earlier returns. Sometime after 10/15/2025 2021 will also stop functioning.  

[baldietax]

I don't think they stop working if they are activated and state program is installed if applicable.  If you try to reinstall and reactivate those versions on a new computer that won't work beyond the current year and 3 prior versions.

If they're working I wouldn't uninstall them unless really want to clean up and confident you don't need to access to your old return any more.  If you do decide to uninstall make sure you have PDF copy of your return with all forms and worksheets.

[Mike9241]

I found that they do stop working because the update server is no longer available so the program cannot be opened. at least that has been my experience for 2019/2020/2021 even though they were up to date with the state installed. What I got was a screen to enter the license code but even after entering that, i got an error message 

the easiest way for @ZbysioSie to check is to try to open the app and see what happens. 

[SteamTrain]

Yep...when I got a new Computer last year, I could reinstall 2020 and newer.

2020 still works jut fine for me.  And I'll leave them all installed (with PDFs backed up offline...and in bank safe-deposit box) until I get a new computer in a few years.   Before that, on the older computer, I had all 8 or so back years still working just fine thru a W10-W11 on-computer upgrade too.

But I'm on Windows 11.  Folks with MACs usually have more back-year compatibility issues...depending on what OS version they have updated to.

[VolvoGirl]

And another wrinkle is if you are on Windows or Mac.  Sounds like the op is in Mac saying Applications folder.   Windows has programs.  On Mac you can’t open Turbo Tax without automatically checking for updates.   In Windows you can bypass the updates if you turned off check for updates before.   The first thing I do after I install Turbo Tax and do the first check for updates I then go to Online-Update Preferences and select Ask me first before updating.