Worth to do taxes and expect a refund?

Taxes suck but I pay and I sleep well.Here in Australia the tax department do check through sociail media also the news papers.Just to day I got a bill for importing a machine from china the goverment just charged me 17% of the value of the machine then on top of that another $1600 in gst then my broker charged me anouther 10% gst as well.This is just a part time buissiness for me to at this stage.I do want to keep what I have worked hard for I dont want the tax man on my door step .Lucky im aware of these charges and factored the cost in.For me honesty is the best policy, I dont like taxes but I do beleave what goes around comes around .Good luck