The amounts withheld can be increased or reduced at your request. To apply for a reduction, complete form TP-1016-V, Application for a Reduction in Source Deductions of Income Tax. To apply for an increase, complete form TP-1017-V, Request to Have Additional Income Tax Withheld at Source.

For example, if you have more than one source of income and you estimate that your source deductions are insufficient to cover all of your income tax payable for the year, you can choose to have the amount withheld increased. You may find that you owe an additional amount when you complete your income tax return.

Conversely, you can choose to have the amount withheld reduced in order to take into account any tax deductions to which you may be entitled.

To have your employer determine the source deductions to make on the amounts paid to you, complete form TP-1015.3-V, Source Deductions Return, and give it your employer.