Adam and Lauren Cranston - the adult children of a former senior ATO office official - have formally denied being behind an alleged $100m tax evasion scam.
Their matters and those of alleged co-conspirators tax lawyer Dev Menon and Jason Cornell Onley will now proceed to a joint NSW Supreme Court trial in August 2020 which is expected to take four months.
When arrested in May 2017, the quartet was allegedly three years into a conspiracy to intentionally defraud the federal government with firm Plutus Payroll.
They are also all accused of dealing with crime proceeds exceeding $1 million.
The court was told the Crown was relying on up to 147,000 files.
Authorities in 2017 described the alleged operation as one of the nation's largest corporate crimes, based on the amount of money involved and alleged co-conspirators.
Onley, 49, and Adam Cranston, 32, allegedly exercised joint control of Plutus Payroll through parent company Synep Pty Ltd
Others allegedly involved in the scheme - former Plutus director Simon Paul Anquetil, Devyn Michelle Hammond, Christopher James Guillian, Paul O'Leary, Daniel Rostankovski and Daniel Simon Hausman - remain before the courts.
Two related trials were also set down on Friday.
Former television journalist Stephen John Barrett - who has pleaded not guilty to blackmailing Adam Cranston and Menon in February 2017 - will face a four-week trial beginning mid-June.
Sevag Chalabian - a lawyer in his early 50s - pleaded not guilty to dealing with crime proceeds valued at more than $1 million between February and May 2017. He's due to face a four-week trial from mid-October.
Adam and Lauren's father, former Australian Taxation Office deputy commissioner Michael Cranston, was acquitted in February by a NSW District Court jury of misusing his role to assist his son.
Australian Associated Press