Final answer:
The percentage of commissions included in calculating the Quebec provincial tax depends on the type of commission.
Step-by-step explanation:
The formula used to calculate the percentage of commissions to be included in calculating the Quebec provincial tax varies depending on the type of commission.
Therefore, option C, 'Depends on the type of commission,' is correct. Different types of commissions may have different tax rates applicable to them.
For example, if one type of commission has a tax rate of 5% and another type has a tax rate of 10%, the percentage of commissions to be included in calculating the Quebec provincial tax will differ based on the type of commission.
It is important to consult with the employee or refer to the relevant guidelines to determine the specific tax rate for each type of commission and calculate the percentage accordingly.