Pretending to be taxation department, they left a voicemail message. I'm sure it is a scam.

I received a call from this number and when I answered, I was played a recorded message about my tax return and told to call back urgently. When I rang back, the person who answered claimed to be “Michael Brown” supposedly from the Australian Tax Office. Told me I had an outstanding amount due to them and if I didn’t settle the balance today I would be sent to jail. Another scam. Best to ignore this number.

Recorded message (robotic, not human) that said a lawsuit was being filed under my name and I could be arrested if I did not call back.