You may notice that some invoices that were paid in QuickBooks appear with a balance in Acctivate if you’re running an older version of QuickBooks.
This problem is usually the result of using the Apply Credits button on the Invoice window in QuickBooks to apply an existing payment. You should open the existing payment and apply it to the invoice to prevent this problem from occurring.
We recommend that you upgrade to the latest version of QuickBooks to resolve this problem, since it has been fixed in QuickBooks 2008.
As a workaround, you can use the option to “synchronize changes since closing date” or “first QB Use” if you don’t want to upgrade QuickBooks yet.