A TFN is a number issued by the Australian Taxation Office to individuals, partnerships, trusts or companies. Each taxpayer has unique TFN which must be declared when you:

  • loge a tax return,
  • apply for certain income assistance or support payments,
  • make or receive payments under Prescribed or Reportable Payment System,
  • start or change jobs,
  • have savings accounts or investments that earn income, or
  • study at a tertiary institution under the HECS Scheme.