Fix QuickBooks Error 6123 with QuickBooks File Doctor

After you’ve downloaded the QuickBooks File Doctor software, run it.

Choose "Check File Damage Only" from the drop-down menu and then "Diagnose File".

Enter the "Admin Password" and click OK.

You can either choose to open the file in a newer version or to repair the file in an older version.

As directed on the screen, follow the steps.

Restart or restart your computer after completing the steps.