Welcome aboard in the QuickBooks Community. I’m here to help make sure your invoices show the previously billed amount.
In situations like this, you’ll need to run the Verify and Rebuild Data utilities. Verifying the data will check any damaged transactions or lists in your company file, and rebuilding it will resolve any problems detected in your account.
To verify the data:
Go to File at the top menu bar.
Click on Verify Data.
Once an error is found, you'll need to continue with rebuilding the data. Here’s how:
Go back to the File menu.
Click on Rebuild Data.
Then you'll be prompted to create a backup copy of your company file.