First, click on Management at the top of your screen and then select Billing from the left side menu.
Once on the Billing page scroll down to Transaction History.
To quickly sort invoices for printing, change the filter in the top right of the Transaction History section from Show All Transactions to Card Charges Only.
Click View next to the invoice you want to select.
This opens a new tab, where you can click the Print Invoice button in the upper right to open the print dialog and either print or download the invoice.
Invoices can be printed/downloaded as many times as you need.
Please see Billing Management and Payment Settings for more information on Billing