Yes received several missed calls looks scam.

Caller: Tax office

Automated mans voice saying there was an outstanding amount I owe and there was a warrant out for my arrest if I didn’t ring them back.

Complete scam, threaten to arrest you with voice to text computer generated voice. Don’t go there

A person rang my mobile and left a message for me to return the call. It was not a normal return message where someone leaves a message. I rang back (02) 8091 1582 not realising it was not a genuine number. The male who answered claimed he was representing the ATO investigation section and the ATO does not contact directly. When I stated the ATO do not have a third party contact people and that he was a scammer he hung up.

ATO robocall

I called back number (02) 8091 1582 rang once then gets disconnected automatically.

Caller: Robot

Scam! Robot voice recording stating that there is a lawsuit being filed under my name and if I don't return the call upon hearing the message, arrest warrants will be issued. I don't know what they are after, but it'll most likely be money to make the lawsuit 'go away'.