When attempting to sync an invoice, if the following error stating 'Please check if the contact, work code, expense item of the invoices are synced to QuickBooks' appears in red at the bottom of the invoice import/export page this is due to one of the items mentioned in the error not being synced/matched to an item in QuickBooks for the integration to work.
When receiving the error above, staff members will want to navigate to the match/sync section for each of the items listed above and ensure all items on the invoice(s) they are trying to export are matched to an item on the QuickBooks side.
Staff can do this by navigating to the match/sync section for contacts under Setup> QuickBooks> Contacts> Match/Synchronized.
For Work codes, staff will navigate to Setup> QuickBooks> Work Codes> Match/Synchronized.
For Expenses, staff will navigate to Setup> QuickBooks> Expense Codes> Match/Synchronized.
Once all three areas have been checked and all items on the invoice (s) that are being synced have been matched to an item in QuickBooks, staff can then attempt to re-export the invoice into QuickBooks.