When you encounter an error on the QuickBooks Sync Errors page (bell icon in the upper right), and have taken steps to manually resolve the error in QuickBooks Online, you can now DISMISS the error.
PRO TIP: Use this feature sparingly, and with complete confidence that you do not wish to ever reprocess the error for the given invoice number, dismissing an error cannot be undone.
When needed, you can push an invoice and or a payment to QuickBooks Online using the steps outlined in this article below. This will regenerate any errors that my have previously been dismissed.
*Please note that DISMISS will not prevent any future errors for dismissed errors for invoices. If you edit any invoice that initiates the update to QuickBooks Online the error will regenerate.