Which of the following information is not required to calculate taxes for an employee?

• A. Employee's SIN
• B. Province of residence
• C. Total earnings
• D. Employee's birth date

Answer: (D)

When calculating payroll taxes, the amount withheld is driven by identifying the employee, applying the correct provincial rates, and using how much they earned. The SIN serves as the unique identifier for reporting to the tax system, so it’s needed. The province of residence determines the provincial tax rates and credits that apply to the employee. The total earnings provide the base amount from which federal and provincial tax, as well as CPP/EI contributions, are calculated. The birth date, however, isn’t part of the standard withholding calculation. It only becomes relevant if you’re specifically claiming age-related tax credits on the TD1 forms, which is an optional election rather than a required input for the basic tax calculation. Therefore, birth date is not required to calculate taxes.