need help changing fuel filter i removed clamp etc got quick disconnect lose and found i have no idea how to remove the other side i need help quickly 'the piece is a black plastic one that goes into a copper 90

 

A bit late telling you this but the clamp should be removed last so you aren't juggling the lines and the filter.

The part that you are trying to remove needs the fuel line pressed towards the filter whilst moving the black circlip backwards with the fuel line. Needless to say, Volvo dealers have a special tool for this but you may get it with a thin screwdriver.