To start, log into your account and go to the Billing page using the user settings menu.
Scroll down to the 'Activity' section. You will see all of your charges for the last 30 days as a default, click 'Download PDF' to obtain invoices for the charges you need. You can adjust the time frame to find past charges or also download a .csv of your charges as well on this page.
Last Updated: 10/25/2016