Turbotax didn't open

[LeonardoSD]

I had issues opening Turbotax 2020 and 2021 in Windows 10 (21H2 OS Build 19044.1415) .

Event Viewer had a .NET error on C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll.

.NET repair tool did not fix the problem.

I replaced the clr.dll v4.8.4420.0 with on old one from another computer v4.8.4400.0, and Turbotax opened again.

Not sure which Windows update pushed the new DLL, but it broke Turbotax.

[GeorgeDenseff]

TurboTax for Windows does rely heavily upon the Net Framework.  Good job finding a solution that worked.