This document presents a comprehensive solution to the BTAX1 case study, focusing on the tax return of Michelle Paquin. The solution includes detailed calculations for various income sources, such as employment income from CGA Limited and SLC Incorporated (including vehicle and travel allowances), rental income, capital gains from the sale of shares, and GIC interest. It also addresses allowable deductions for expenses like convention fees (with adjustments for meals), accounting and legal fees, and business insurance. The solution considers capital cost allowance for assets like cash registers, computers, and vehicles. The document also provides references to relevant tax guidelines and regulations, ensuring accuracy and completeness in the tax calculations. This case study solution is designed to aid students in understanding and solving complex tax scenarios, providing a practical application of tax principles.