Had a call from this number saying it was ATO and I called it back, it picked up within two rings and the person said 'ATO' and said a name and what she said was an ID number but I couldn't understand what she said. She asked for my name and I gave it but had to repeat my very simple last name about four times so I guessed it was an information fishing scam and told them not to call me again.

I called back number (08) 8120 4484 reached IVR for NAB.