We help you setup an account (if you don't already have one) with one of our integrated shipping services (UPS, Fedex, USPS, Canada Post, etc.). We then use their access key which is provided to you, to integrate the online store and products. To come up with accurate shipping prices, you must have the dimensions of your packaged products available (length, width, height and weight) so our systems can query the shipping service for shipment pricing.