Saez, An application by

This matter concerned an application by Saez for leave to appeal against a decision of the Full Federal Court. The dispute arose from a challenge to the validity of a notice of assessment issued by the Commissioner of Taxation. Saez had sought to have the assessment set aside, but this application was dismissed by the primary judge and subsequently by the Full Federal Court.

The central legal issue before the High Court was whether the Full Federal Court had erred in its interpretation of the relevant provisions of the *Income Tax Assessment Act 1936* (Cth) concerning the Commissioner's power to issue a notice of assessment and the grounds upon which such an assessment could be challenged. Specifically, the Court considered the scope of the Commissioner's discretion and the requirements for a taxpayer to demonstrate that an assessment was invalid.

Gleeson CJ, in dismissing the application for leave to appeal, found no arguable error in the Full Federal Court's reasoning. His Honour affirmed that the Full Federal Court had correctly applied established principles regarding the finality of tax assessments and the limited circumstances in which they may be impugned. The Court reiterated that a taxpayer bears a significant onus to establish invalidity, and that mere disagreement with the Commissioner's assessment or a perceived lack of procedural fairness in the assessment process, without more, does not typically vitiate the assessment itself.

Leave to appeal was refused.