I understand from the Australia government webpage, we are allow to bring in AUS$900 per adult. So example, if I brought a laptop from Singapore that cost AUD$1200+ and did not get a GST/Tax refund in Singapore, do I still need to pay for tax at Australia airport?
If I have to pay for tax but have either loss or throw the receipt away for the laptop, how will customs charge me for the tax? How is it able for custom to tell if the item is new? Or if the items has been brought for a year or not?
If I received gifts from my friends at the airport in Singapore and bring it back to Australia, do I need to pay tax? But what if the gifts were given a year ago, do I need to pay tax?