this is what i found in the web. hope it helps.
How to Remove TurboTax Error 700001
To resolve TurboTax Error 700001, follow these steps:
Close Duplicate Instances: Access Task Manager (Ctrl + Shift + Esc on Windows), find any running TurboTax processes, and terminate them.
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Switch User Accounts: Ensure you are logged into the correct Windows account that corresponds with your TurboTax installation.
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Uninstall and Reinstall TurboTax: Remove the software from your computer, restart your system, and reinstall TurboTax by logging into your account on their website or using the installation media. This will use up another license activation of the 5 permitted
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Adjust Firewall Settings: Temporarily disable your firewall during installation. Once TurboTax is installed, add it to the list of permitted applications in your firewall settings.
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Contact TurboTax Support: If the problem continues, reach out to TurboTax support for further assistance.
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If you encounter Error 700001 while installing TurboTax on a Windows 11 computer, it may be due to a Windows 11 problem. In such cases, you might need to revert to using Google Chrome as the default browser for the installation process.
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