If you are Australian and Domicile in Australia there is no TIN. What they are after is if you are an individual (not SMSF or business) a completed IRS W8-BEN form. Maybe discuss with IG. You would have received a hardcopy form when you received your DRS package. Also maybe completed on line in your Computershare US account.
IHL Price at posting:
4.1¢ Sentiment: Buy Disclosure: Held