How to Add PO to a Quickbooks Online Invoice. QuickBooks enables you to manage all your financial information and automate most of the related tasks, including invoicing your customers.

Decreasing Credit Balance Choose "Customers" and "Create Invoices" from the QuickBooks menu. Select the customer with the credit balance from the list box.

QuickBooks 2010 for Mac can now process credit card transactions directly in-app and features a new “Guide Me” functionality that guides you through creating invoices and entering customer ...