View past payments
From PhonePower Knowledge Base
You can view your past invoices by clicking on Invoices & Payments from your MyAccount menu.
Once on the Invoices and Payments page you will see the Pending Charges for your account as well as two buttons.
The first button View Invoices will display a list of previous payments made. Each payment will have a small + icon to the left of them. Clicking on the plus will expand each payment to show which invoices are included in that payment. You can click the individual invoices within each payment to see an itemized account of each invoice.