There are several ways to find out your TFN. It will usually be in the top right-hand corner of your income tax notice of assessment from the ATO, but you’ll also be able to find it on documents such as payslips and superannuation statements. Alternatively, if you have a myGov account and have connected your account with the ATO, you can locate your TFN online, or you can simply ring the ATO or speak to your accountant.