@ karenemueller also wrote: "None of the troubleshooting applies or works."
If you're trying to open an existing TurboTax *.tax2019 file (or a prior-year *.taxYYYY file) and getting Error 190, here's something to try, if you haven't already. Launch TurboTax, and minimally start a NEW tax return, just long enough to download the state forms. Once you have the state forms, then exit that file, restart your computer (reboot), then launch TurboTax and open your return file. If you continue to get a blank screen when you try to download the state forms, please contact TurboTax Support as outlined in my comment above.
