If your posted invoice is not appearing in your cheque printing screen it is one of two problems:
1. First check the due date and bank code (eg B1) matches the Cheque Printing screen.
2. The invoice was probably entered with a due date further in the future than what you are printing invoices for. You can either change the cheque printing screen due date then press Tab and then open the invoice list tab. Or you can change the invoice due date directly via Invoice Inquiry 1.
The invoice does not have a cheque number allocated to it. If it has a cheque number, it would mean that a cheque has already been run so the invoice won’t appear in the cheque printing screen.