To accept inventory with a WCIA approved Json hyperlink, navigate to the Incoming screen and select the Upload Transfer button.
This will present you with a screen where you can enter in the URL of the Json provided to you by the vendor, (the URL given to the store from the vendor. It will be different for each vendor and each product received.) Enter a URL and then press Start Upload. If the data can be read, the system will load that manifest into an accepted state, where you can then open it up and make any changes.