It comes as the Taxation Office revealed its investigating hundreds of Australians over their financial dealings with a Panama-based law firm that helps clients establish companies in offshore tax havens.

The exterior of the Australian Government Taxation Office in Sydney on Monday, May 28, 2012. (AAP Image/April Fonti) NO ARCHIVING Source: AAP
It comes as the Taxation Office revealed its investigating hundreds of Australians over their financial dealings with a Panama-based law firm that helps clients establish companies in offshore tax havens.