Steve76, no idea what tax laws are in NZ.
But, and for Flungdung too, in Oz they are about to change and you will be taxed at the normal Oz rate unless you spend bu@@er all time back in Oz. No longer will 6/6 be tax free, but if you worked 10 months over there and only had two months back, you might get away with it. Run a search on the D&G forums as there was an extensive thread on this topic a few months ago, and all was explained.
This very thing caused me to pull out my application.