HOW TO Lodge Your Complaint
ATO (CWLTH) resource. Rules Mate indexes this as part of the Australian compliance corpus. Click through for the regulator's primary source.
https://www.ato.gov.au/about-ato/contact-us/complaints-compliments-and-feedback/complaints-about-the-ato/how-to-lodge-your-complaint
Rules Mate indexes Australian government compliance resources to make them searchable. We link to + summarise; always verify the live source before acting.