https://www.ato.gov.au/about-ato/contact-us/phone-us/
ato are the peeps that enforce the taxation laws so they know a fair bit about it
ato phone numbers at the link
they can also be emailed for help
or they can be sent a letter
or live chat
they are pretty good at helping when peeps do not understand the tax laws.
private rulings are also available to fit your exact circumstances.
