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  • Lost or stolen TFN

    If you can't find your tax file number (TFN) and have a myGov account linked to the ATO, you can find it online. You should tell us as soon as possible if your TFN is stolen or misused.

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    Find your TFN

    You will need your TFN when starting a new job, applying for government benefits, lodging a tax return or applying for higher education loans.

    If you already have a TFN and don't remember the number, you can find it online using your myGov account.

    Log in to myGov

    If you don’t have a myGov account, you can usually find your TFN on:

    • your income tax notice of assessment, if you have lodged a tax return
    • letters you have received from us, such as a statement of account
    • a payment summary or income statement (provided by your employer)
    • your superannuation account statement.

    If you use a registered tax agent, you can ask them for your TFN.

    If you still can't find your TFN after checking these options, phone us.

    See also:

    If you think your TFN is lost or stolen

    If your TFN has been lost, stolen or accessed by an unauthorised third party, tell us as soon as possible. If you suspect misuse, phone our Client identity support centre on 1800 467 033 8.00am–6.00pm, Monday to Friday.

    Our Client identity support centre helps people who have had their identities stolen or misused. They'll give you information, advice and assistance to re-establish your identity. They may also apply security measures that will monitor any unusual or suspicious activity on your account.

    See also:

    Last modified: 12 Aug 2020QC 22601