As an Administrator, you can view the details of your ilos subscription and manage payment information under Account Settings > Billing.
ilos Subscription: Here you will see the details of your ilos plan including pricing, number of licenses, and billing details.
Payment Information: Here you can update your credit card information. Once saved, you will be automatically charged at the appropriate billing date. You should receive an invoice to your email, but if you do not see one, please contact Support.