Hello, @Electrician.
Awesome to have you in the Community. You're in the correct spot to get assistance.
For this matter, I'd check the file for any damage that happened during the upgrade. Follow these few simple steps, and you are on the way to success:
- Go to File.
- Then Utilities.
- Run Rebuild Data.
- When the rebuild completes, go through the same steps and verify data.
Once these steps complete, view the Verify Utility and QuickBooks.log file to get the specific errors.
If any further assistance is needed, I'm just a click away.
