How to add a Folio Item(AKA Add-On) 1.- Find Reservation. 2.- Open the reservation. 3.- Click “New Add-On” at the bottom of the page. 4.- Click this dropdown and select what you will be charging for. 5.- Enter how much you will be charging under the “Amount” section. 6.- Type “299” 7.- Click “Submit” You can download this guide below. How to add a FolioItem AKA Add-On