I can help you if you have a Mac. I just resolved the problem. I believe it is similar in Windows, but I don't have the steps for you to share. It is a file access problem. Make sure you have the latest updates to your Turbot Tax. Close Turbo Tax application completely.
1. Go to your System Preferences on your Mac.
2. Click on Security & Privacy.
3. Cursor down on the left within the popup window to the option, Full Disk Access.
4. On the bottom left of that popup window, click the lock to make changes.
5. If TurboTax 2020 is not listed in the list to the right in the pop up window, you can add it by clicking on the +
sign, otherwise check the TurboTax 2020 box to allow access to your disk drive.
6. Click the lock to prevent further changes in the bottom left popup window.
7. Exit out and try opening your return and saving it within TurboTax.
Hope this helps. It did for me.
