You will become EDI compliant by using a third party EDI solution (on-promise, managed EDI or cloud EDI) to start trading EDI documents with Walmart by following their compliance guidelines. Depending on your internal technical infrastructure and resources and the size of your business, you can choose basic EDI software packages or advanced kits that allow you to become EDI compliant with Walmart. If you are a small business, do not forget to checkout EDI software for small business. Your EDI service provider should help you with end-to-end EDI implementation starting from obtaining trading partner contact to testing to going live. If you are a vendor, you have to be Walmart-approved. You will have to go through a series of EDI testing first before you start sending and receiving EDI documents back and forth. This is to ensure all the connections are working correctly.