In order to purchase add-on for your subscription's next renewal, please follow the steps below:
1. a.) Go to the “My Account Dashboard” on the Home tab of your Customer Portal
b.) Scroll down to click View Plan to see the detail of your subscription
2. On your subscription page, scroll down to see Subscription Status and click Change Plan and Add-ons
3. On Change Plan & Add-ons, scroll down to choose which Shipping Add-on you would like to purchase. Review the amount of your purchase before clicking Change Plan.