Go to your subscriptions page, click on the "Invoices" tab at the top right corner of the screen where you can see your recent invoices listed. To change your billing address, click on the "Change billing address" link and fill in the new information. Then, you will see your updated invoices.
To open an invoice, click on the "View invoice" button for the invoice you want to see in detail.
To save or print your invoice as a PDF use your browser's Print option.