You need this number through out your life while living in Australia and want earn money in Australia to make a living. What is it? It is a TFN (Tax file number ) which is an important piece of personal identification which should not be lost and never revealed to anyone unless they are authorised to ask for it. - Tuáñrtu nombór iba hamaka zoruri laibou Australia takafoille ar thiya hamaito monohoile ar Australiat zindigi goriboulla.Iba ki?Iba oiled ki TFN (Tax file nombór) ziíba niki zatir sinñor pecan zoruri maalumat, hazaí nafariba ar honikaré hoí nafariba bana zitara ijazot faiyé tararé di fariba.