Shipping Setup Tool, is now available for all Google Checkout merchants, that makes setting up accurate shipping options a snap. In just a few clicks, you can configure and customize the shipping settings that you passed in the Checkout API. The tool will walk you through various options and steps required to configure shipping options you make available to your buyers, and then allow you to modify these settings. You can find the shipping setup tool in the Settings tab of your Checkout Merchant Center. Note that if you continue to pass shipping information via the API, it will override any information you have set up here.