Do I need to provide my Tax File Number (TFN)?
It is not a legal requirement for you to provide your Tax File Number (TFN) however if you don’t, we are required by law to withhold tax from your investment income at the highest individual income tax rate plus Medicare levy (which is currently 47%).
If you choose not to provide your TFN, you may be able to claim any tax withheld as a credit to your tax return.