The Open Invoice Report allows you to have a printable listing of all your Open Invoices detailing information about which customers have open invoices, the total amounts and how the invoices were generated.
First go to Invoicing and View Pending Invoices.
Next, hit the drop down menu and choose Open Invoice Report, and then Print.
Now you have a Printable list of all your Invoices that are currently open, along with additional information including the customer name, date, total of the order and so on.