The best way to view, manage and pay your bills is via My Account, or via the AGL app.
When you are logged into My Account, click on Billing on the top of the screen. Here you will see your most current bill and underneath your bill history is listed, ordered from most recent. Click PDF to open the detailed copy of a bill. From here you can print or email.
If you are using the AGL app, once logged in go to the Billing tab down the bottom. Select the Bill History button to view bills. A list of your bills will appear ordered from most recent. Click the blue text View Bill to open the detailed copy of a bill.