This study focuses on understanding tax calculations and deductions for Kate based on her income and expenses. It covers the rules and applications of taxation law in Australia, including the definition of income from personal exertion, allowable deductions under section 8-1 of the ITAA 1997, and taxability of income under section 6-5 of the ITAA 1997. The study also provides examples and working notes to explain the concepts. Course code and college/university are not mentioned.