Author: EthanATO(Community Support)Community Support 25 Feb 2021
Hi @MikeCalton,
A TFN doesn't actually expirem instead what can occur is an indicator is left on your account when you leave the country, which may be what the person you spoke to was having trouble with.
If you remember the TFN you can setup a myGov account and link it to the ATO. Once that has been set up if the money is sitting there waiting to be refunded you just need to update your bank details under your profile in the ATO section.
If you don't know your TFN, or are unable to setup myGov, you can contact us on our overseas enquiries line to have the refund processed manually.
Hope this helps, let us know if you have any further questions.