From the Shopify Point of Sale on the iPad:
-Click on Orders, then hit the search icon
-If they have their receipt, click on the barcode symbol on the top right to activate the camera to scan the bottom of the receipt QR code
-If they don't have the receipt, you can type in the name of the product in the search bar and it will bring up all orders that have sold that item
-Once you find the correct order, click on return or exchange
-Choose the item you are returning or exchanging
-For returns, once you've chose the item, it will offer the option to return to gift card, choose that
-If you are exchanging, once you've chosen the item, it will bring up the search button to ring up anything else