Marcel's and Stephanie's taxable incomes are less than their annual salaries because they both have a series of tax deductions that favor them when it comes to paying taxes.
A deductible item therefore reduces the income on which payment is made, in the case of profit tax (such as corporate income tax) the profit of a company on which payment is made.
Learn more about tax deductions in https://brainly.com/question/20120691
