Checkout intergration with FedX, DHL, UPS, and USPO

I want my [login to view URL] site to have FEDX, UPS, USPO, and DHL shipping integrated in their checkout eliminating the need for them to set shipping zones and prices. My website is a webstore hosting service. you can check the functions at : [login to view URL] user name: test password: test. you may be able to get more details from the site where i purchased this software: [login to view URL]