To return your Google Shopping/Express/Shop On Google order, log into your Google Shopping account, go to Orders below the menu icon, choose the order you'd like to return, and then click Start a return.
Then, choose the reason you're returning each item. You may also include additional details about your return that will be shared with the merchant when they process your return.
Click Confirm return
Review the "Estimated refund" amount and then click Confirm return. On the next page, click Print label & slip to print your UPS return shipping label and packing slip.