In your account, on the top ri ght, you will see a link "Subscriptions". Click that link and go into the subscription portal, find your order and click into it. It will have an "Active" status. From there click the "Edit" button to edit the details of your order. Once you're in there, you will see a the "Add Product" button. Click that button to add products to your order. The products will be included in your next order cycle.