This document presents a comprehensive solution to a TAX assignment, addressing key concepts in taxation law and financial calculations. The assignment covers several critical areas, including income tax deductions under the Income Tax Assessment Act 1997, exploring deductible expenses such as those related to business income and legal proceedings. It also analyzes GST input credits, specifically focusing on the eligibility of advertisement expenses for input tax credit, with a detailed case study involving a bank's expenditure. Additionally, the assignment provides a tax offset calculation, demonstrating the process of determining the foreign tax offset limit. The document includes references to relevant literature and legal frameworks, providing a well-structured and informative analysis of the topics covered.