Returned paperwork possible
Warrant what a load on crap people get on myGov and you will know in a second this is a scammer do t be fooled

Threatening phone call about tax fraud, arrest warrant etc. I blocked the number but when it rang it came up as a fraud number.

Caller: Scammers

This call, when answered, played an automated message in a computerised voice, claiming that my husband owed a tax debt, and threatening prosecution unless we paid. Very clearly one of those scam calls people are frequently warned about. It blows my mind that anyone falls for these, but some people must, because the scammers keep calling. Don't fall for it!

Caller: Australian Tax office

SPAM call regarding a tax audit