From your profile page, select “Advertise” from the top right corner.

A new window will open. This is the campaign manager section that displays all ad accounts you manage. Select the ad account that you want to see the billing center for.

You are now in the business-specific ad account. Select the ad account menu from the top-right menu. Then, select “Billing center”.

You now can access any necessary information you need from the billing center such as receipts and credit card information.