Hi there, angusk572.
I appreciate you for providing details of the situation that you're in at the moment. To help you get through this, I'd recommend performing the Verify and Rebuild process inside QuickBooks Desktop (QBDT). This way, the program can commence the identifying process to determine the root cause of the problem and then start fixing them. I'll gladly write the steps below to get you going.
- Go to Window then select Close All.
- Go to File, then select Utilities.
- Select Verify Data. If you see:
- QuickBooks detected no problems with your data—your data is clean, and you don’t need to do anything else.
- An error message—search for it on our QuickBooks Desktop support site for how to fix it.
- Your data has lost integrity—Data damage was found in the file. Rebuild your data to fix it.
For further guidelines, you can visit this article: Verify and Rebuild Data in QuickBooks Desktop.
Moreover, I've got this article that contains details about MTD for QBDT: VAT and Making Tax Digital for QuickBooks Desktop.
@angusk572, I'm set to provide further assistance with this in case the issue still persists. Feel free to leave a comment below so I can get back to you as soon as possible. Stay safe, and have a nice day!
