Got same message to call this same number 30th of Jun around lunchtime. The guy's name is Kenneth Matthews of ATO supposedly but asked to speak to my attorney. Sounded Filipino. I wish they get caught.

This Number(02) 6698 4026 has been left on my phone message bank claiming that they are from Australian Tax Office & stating that I have to contact them ASAP regarding fraudulent behaviour.
Beware it is a scam