best to contact support because the resolution for your issue may depend on the version of windows you're using and the product year.
here are some suggestions - I know you've tried some already.
Access violations in TurboTax Business can be quite frustrating. These errors often occur due to conflicts with older versions of the software or issues with the installation process. Here are a few steps you can try to resolve the issue:
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Uninstall and Reinstall: Completely uninstall all versions of TurboTax from your computer. After uninstalling, reboot your system. Then, create a new folder in your “Program Files (x86)” directory named “Intuit2” and reinstall Turb...1.
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Run as Administrator: Sometimes, running the program as an administrator can help. Right-click on the TurboTax icon and select “Run as administrator”.
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Check for Updates: Ensure that your TurboTax software is up to date. Sometimes, updates can fix bugs and compatibility issues.
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.NET Framework: TurboTax may require certain versions of the .NET Framework. Make sure you have .NET Framework 3.5 and 4.8 installed on your system
for 4.8
https://support.microsoft.com/en-us/topic/microsoft-net-framework-4-8-on-windows-10-version-1709-win...
also depending on your os you may need both the 32 bit and 64 bit versions of net framework 3.5 and 4.8
