I need the link that is the guide that shows the instructions on how to do it. It is a pdf file http://www.sat.gob.mx/information_fiscal/tramites/inscripcion_rfc/Documents/Guia_inscripcion_CURP_18072017.pdf
This is the link that AlanMexicali produced on the Guide to obtaining your RFC on line but it is not accessible. Does anyone have another link showing the guide on how to do it?