Most helpful replyATO Certified Response
Author: EthanATO(Community Support)Community Support ATO Certified Response6 Oct 2021Hi @kaitlynday88, If you've lost your TFN and have a myGov account linked with us you can find it on there under your profile. If you're unable to do that there's a few other options to locate it. Your TFN can usually be found on a notice of assessment we've sent you, or any other letters from us. You can also try locating a payment summary from your employer or a superannuation account statement. If you have no luck with these options you'll need to get in contact with our individuals team. I'll post a link below to our lost TFN page that runs through these options. It also includes a link to giving us a call. Lost TFN: https://www.ato.gov.au/Individuals/Tax-file-number/Lost-or-stolen-TFN/