Owner Admins may access the Space's Billing and Subscription information under the Space Billing header (Space Settings > Other > Space Billing in the Main Menu).
Your current billing plan will be listed on the initial view (in the example above, it's listed as Standard).
To access payment information or update your plan, you'll need to proceed to the next Billing screen. You'll be prompted to check the box to agree to the Terms & Conditions. Check the box and click Change Plan.
Here, you'll see other Plan options if you wish to change, and you may toggle between USD and other currencies. Click the Back button to return to Space Settings.
If you need to update your payment method or other billing details, click Manage Billing.
Add or edit any information as needed through the Stripe customer portal, and click Save.
For more information about Trials, Subscriptions, and Contracts, click HERE.