Closing a Collective
Go to your Collective's page, click on the setting button on the right of your profile.
Head to the Advanced page to access those options.
If your Collective does not have any transactions or financial activity, you can delete it. Deleting a Collective will remove its data, including memberships, payment methods, etc.
If your Collective has transactions, you can archive it instead of deleting. This will mark the Collective as inactive and prevent any new donations.