What is a TD1 tax form? The TD1 Personal Tax Credits Return is used to calculate the amount of income tax that will be deducted or withheld from your employment or pension income. It is called a personal tax credit return, and personal tax credits (non-refundable tax credits) are taken into consideration when determining your tax withholding calculations. Simply put, a TD1, Personal Tax Credits Return, is a form that is necessary for calculating how much tax should be withheld from payments. If you are an employer who must run payroll in Canada or a pension payer, you most likely will be asked to fill this form out to […]