Intelligence obtained during the Operation Ironside enabled the AFP to disrupt the plan to smuggle the drugs into Australia inside two welding machines.
ATO Assistant Commissioner Ash Khera said financial crime affected all Australians, robbing them of funding for essential services such as health and education.
The crash killed 42-year-old mother Nancy Lefrançois and her 11-year-old son Loïc Chevalier, who were travelling in a passenger vehicle struck in the collision.