Your Organisation’s Billing details can be accessed via the Organisation page. Access the Billing page by clicking your username on the bottom left and then selecting 'Organisation', then select ‘Billing’ on the left navbar.

This contains information relating to your Account’s subscription as well as managing invoices, payments, and changing your plan's feature set.

If you need to purchase additional document credits you can do so on this page.

Access to the Billing page is managed on the Users page.