A dispute about the validity or lawfulness of the Commissioner's use of a taxpayer's tax file number on a notice issued under s 162 of the Income Tax Assessment Act 1936 (Cth) is irrelevant to the offence of failing to comply with that notice under s 8C(1)(a) of the Taxation Administration Act 1953 (Cth). The notice makes a valid request as a matter of fact, irrespective of the status of the TFN recorded on it.
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