unaccept crafter quest

is it possible to retract acceptance of one of the crafter tali quest?i initually thought that we had to do all the quests to get the tali.ive since been told that we can stop at any point and (i presume)get the tali up to the point we completed.i accepted the tinkers quest before i was told i could stop and went back to the statue to quit .it would nt let me.presumably because i had already accepted the next quest.is it possible to unaccept the tinkers quest and end it right there?
 
Top