how do you change a right rear turn signal bulb

you need to open the rear hatch; locate the mounting screws for the tail light assembly, remove them; you may have to remove the trim panel from the interior to access the bolts, they should just clip into place or be screwed down. Once you have the assembly out you should be able to locate the wiring harness to the tail light assembly; just twist the harness in the direction indicated on it then remove the bulb and replace it with a new one; repeat the removal process in reverse order