Message left saying "Inform you that your account has mark lien for tax avoidation paperworks sent to registered address had also returned back and signed and underlivered for this". Rang the number back and got "Phillip Newman Tax Office". Hung up when I heard his not so English accent.

Caller: ATO SCAM

Gave number saying tax drop and court case launched against me and if don’t call back be arrested

Caller: Australian Tax Office ;)

Had a missed call today from the ATO (!) who left a voice message that suggested my warrant for my arrest would be issued if I did not contact them with details to be processed.
It was an automated message.
I called back the number which seemed to be redirected to somewhere overseas and a male with a thick Indian accent answered the phone. I then hung up.