If you have an account at IcthusTech.com login. If you need to create one please do so. You must have an account to manage subscriptions. If the subscription is for your organization you may want to create an account specifically for the organization and not a personal account.

Once you are logged in select your name

Then select "Manage Services"

Then select your "Subscription"

From here you will be taken to the PayPal site where you can finalize the process. The subscription charge will be automatic every subscription period.