Prima facie you are an NRI and any income earned in India would be taxed in India.
Also while transferring the amount from NRO to NRE account you would need Form 15CA 15CB wherein you have to mention whether tax was paid on such transfer or not.
Also as per article 24 any tax paid in India one would get its credit in Australia if the income is taxed there, so there will be no double taxation.
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