Are you waiting for a credit invoice?
If you have an invoice that needs to be credited, you can send it to the Credit Memo queue by checking the “The invoice must be credited" box on the Send form. Once you’ve checked the box, the invoice is processed as usual, with the exception that it goes to the “Credit Memo” queue before being posted to the general ledger.
To learn more, click here: Credit memo and link credit-debit invoices