Best place to find out about tax is on the ato website. I recently moved home to Aus after a few years with EK, and so long as you pass (more appropriately- fail) the residency tests- "the 183 day test" "the domicile test" or the "resides test"-then you wont have to pay tax.
Because you are living in Dubai, on a 3 year contract and have essentailly relocated to the UAE with a live in- working visa you should be able to show you are not a resident for tax purposes. From memory I used the "domicile test".
Any income you DO receive in Aus, especially interest in bank accounts MUST be declared and is texed at the higher rate.
It's all quite confusing, but having just done it this year the ato website while giving some information is quite hard to navigate.
I'd suggest when you do come home to Aus that you get a professional to do your tax just to be certain.
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