The ATO should have offered you a chance to correct your return, if you believe you have not done the return properly, complete the correction form that came with the review letter and forward it to the ATO.
Review很广泛,由于得多人都少报了利息支出。各大银行都是会把集体利息报给ATO的,当ATO发现银行所报的与你填写的有出入时,就会写信告诉你。你也不必做甚么,到时ATO会发个AMENDMENT给你,你就按新的NOTICE of Amended Assessment补交税就行-了。当初叫你补交才好呢,假如过上一两年才REVIEW你,你还得交他们利息呢。