There are two different invoice document types in EnterYourHours.com. The first type, which is the default, is the basic invoice type. This document breaks down all billing detail for the current billing cycle but doesn't show past due balances or payment information. The other invoice document type is the one you will want to use. The "Bill" document type shows all the information of a basic invoice, but includes balance and payment information. You can choose the Bill document type and configure how it will look in the Settings -> Invoice screen.