Although the ATO warned of a senior fraud call against taxpayers three months ago, the situation remains grim, with losses of A $ eight hundred and thirty thousand last month alone.
Accounting experts say swindlers are increasingly experienced, and they still scare clients with the intimidation of late tax defaulters at arrest.
Stacey Price, founder of Healthy Business Finnaces, said: "I had a client who called me for this last week. He received two calls in a day saying that he would be arrested. "
"he called back. He thinks it`s a liar, but he thinks if it`s really ATO, he should call back. But I also know that someone else received a fraud call but didn`t tell me. "
ATO once told < The Age > and < SMH > that it asked taxpayers to call to report those phone numbers so that its investigation team could track them.
ATO said it received more than 4000 fraud calls today in July, up from 27100 last month, with losses soaring from one hundred and six thousand nine hundred and ninety nine to eight hundred and thirty thousand, and 177 people were admitted.
A ATO spokesman said: "fraudulent phone calls are difficult to regulate because they usually represent crimes committed overseas."
But ATO said that while its own fixed number was used to cheat, what taxpayers need to know is that when ATO calls, it usually doesn`t show the caller number.
"We can say with certainty that if there is an incoming ID, then ATO is not looking for you."
The ATO first issued a fraud call warning in March today, and since then the fraud has grown more sophisticated.
ATO told taxpayers on Facebook that every report would be useful because "We have a panel to investigate fraud and work closely with various law and telecommunications agencies to prevent such organized crime."
Experts say it is not easy to find the source of these numbers because the real source of the phone is unknown.
Dave Lacey, a cyber security expert at Sunshine Coast University, said in October that there are many free programs that allow you to pick out a phone number you want, almost all of which are based overseas.
Price said she was also worried that tax payers had collected a lot of information.
"once the tax numbers and boycott are given, they can do a lot of things. "We usually want our clients to know that they have to be very careful to return taxes if they tell a liar, but it is also possible that someone will use the tax number and address to set up another bank account."
