Australia · Independent guide
Lost TFN: where to find it
You keep the same TFN for life, so don't apply again. Check ATO online services through myGov, a previous tax return or notice of assessment, a payment summary, or your super fund statement. If none work, phone the ATO and verify your identity.
Official site: ATO — Tax file number ↗
Places to look
- ATO online services (via myGov) — My profile.
- Notice of assessment or past tax return.
- Income statement or payment summary.
- Superannuation fund statements.
- A registered tax agent you've used.
If your TFN was stolen
Contact the ATO to report it, and IDCARE for identity support.