Thanks for this cparke3, however when I tried as you advised to run the uninstaller for the 2 states I wanted to remove, the uninstaller indicated that it couldn't install them. I tried both, and maybe it was a syntax error or something, but I found another way. I simply navigated to the location in the folder you had advised (C:\ProgramData\Intuit\Common\Update Service\v4\Data), found the msi file ("wnhiper.msi" & "wcoiper.msi", in my case for New Hampshire & Colorado - I had to dig down into the tree) and right clicked on each of them. There, the uninstall option appears, and I clicked it - even easier! After a moment, I got the "preparing to remove", then the warning screen "Do you want to allow this app to make changes to your device", to which I clicked "yes". The uninstall script must have run, because I got no errors. Then I went to edit the registry as you advised, into the HKEY_CURRENT_USER\SOFTWARE\Intuit\TY20\PREFILLPERSTATES and deleted the wnhiper & wcoiper registry keys. When I restarted Turbotax 2020, NH & CO were gone! So thanks for the housekeeping solution!
