To make best use of Invoicing, you should be familiar with system-wide features described in the System User's Guide, the System Setup Guide, and the System Administrator's Guide. This guide is designed to give you an understanding of how to use the features of Invoicing, and how it integrates with the Microsoft Dynamics GP system. In this article, we describe transaction entry in the Invoicing module in Dynamics GP. You can use Invoicing to enter and edit invoices and returns and print an invoice or return.