Which organization should you contact for assistance with TFN issues?

The correct choice is the Australian Taxation Office (ATO) because it is the primary federal agency responsible for managing tax matters in Australia, including issues related to Tax File Numbers (TFNs). The ATO oversees the administration of tax laws, ensuring that individuals and businesses comply with their tax obligations. If you encounter any problems or have inquiries about your TFN, the ATO has the necessary resources, expertise, and services to assist you effectively.

For instance, if you need clarification on how to apply for a TFN, how to update your details, or have concerns about misuse of your number, the ATO can provide direct support and guidance. Other organizations mentioned may handle related but distinct matters; for example, the Department of Home Affairs focuses on immigration and citizenship, while the Financial Ombudsman Service deals with disputes between consumers and financial service providers. Local taxation offices might assist with particular regional matters but ultimately defer to the policies and regulations established by the ATO.