A TFN is a unique number issued by the Tax Office to individuals and organisations.

Partnerships, companies and trusts need their own TFN. A TFN can be obtained at the same time as an ABN, using the same application form.

Sole traders use their individual TFN in dealings with the Tax Office.

Some of the main reasons for having a TFN are:

• to quote to employers (this applies to individuals only)
• to quote to investment bodies responsible for paying interest, dividends and unit trust distributions
• to quote to government bodies, for example the Tax Office, when applying for an Australian Business Number (ABN) or lodging income tax returns.

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