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Tax Information

Taxes are deducted from your earnings according to Canada Revenue Agency (CRA) legislation. Information on the latest tax forms and accessing tax slips can be found on this page.

TD1 Forms

2020 TD1 Federal and Provincial Personal Exemption amounts effective January 1, 2020.

Your current Federal and Provincial exemption amounts on file for 2020 are printed on your pay statement – check your first pay statement with a January deposit date. These are the amounts used to calculate your income tax payable for the 2020 taxation year.

Please complete 2020 TD1 Personal Tax Credits Return if one of the following scenarios applies:

  • claiming other than the Basic Personal Exemption amounts
  • changing your current claim to the Basic Personal Exemption
  • requesting Additional Tax deductions

Forward completed/signed Federal and Provincial forms to your HR Advisor.

Changes to Payroll Deductions – Effective November 6, 2020

 The Canada Revenue Agency (CRA) has increased the Federal Basic Personal Exemption amount for the 2020 tax year from $12,298 to $13,229.

This change has been implemented in our payroll system commencing the November 6, 2020 pay deposit.

With this change, some employees may notice a small decline in their bi-weekly Canadian Income Tax deduction. Any necessary adjustments to taxes will be reviewed by the CRA when an employee files their personal income tax return.

As a reminder, it is recommended to periodically review your personal tax declarations. If one of the following scenarios applies to you, please complete a new TD1 Personal Tax Credit Return form:

  • claiming more than the Basic Personal Exemption Amounts
  • changing your current claim to the Basic Personal Exemption Amount
  • requesting Additional Tax deductions

Questions regarding this change or newly completed Federal and Provincial TD1 forms can be forwarded to your HR Representative.


Federal TD1 Tax Exemption

2020 Personal Tax Credits Return - Federal Form | PDF

Ontario TD1 Tax Exemption

2020 Personal Tax Credits Return - Ontario Provincial Form | PDF

Application for Individual Tax Number (ITN) for Non-Residents

Non-residents to fill this out this form to accompany the Non-Resident Tax Waiver form if no Social Insurance Number (SIN) or Individual Tax Number (ITN) has been issued.  | PDF

T4 and T4A Slips

T4 tax slips for 2019 and subsequent years will be provided to McMaster University employees by electronic delivery through Mosaic.  Electronic delivery is fast, secure, and allows employees to print tax slips at their convenience or to download a digital copy of their slip. Recent amendments to the Income Tax Act now allow employers to use electronic distribution of T4 tax slips and the Canada Revenue Agency recognizes electronic delivery as a valid means of providing tax slips to individuals.

The 2019 employee T4 slips are now available in accordance with the annual deadline set by the Canada Revenue Agency.

For those employees who had previously withdrawn their consent to receive their T4A slips electronically and would like to receive an electronic copy of your T4A, please confirm consent to access your slip information. For those employees who did not give consent or withdrew consent prior to the date that the annual tax slips were produced, a T4A paper copy will continue to be mailed to the current address on file.

To confirm consent to receive your T4A Slip online through Mosaic, or withdraw your consent in order to receive a paper copy:

  • Use the drop down on your Mosaic Home page and select the Employee Self Service option
  • Click on the “Opt for Electronic T4/T4A Slip” tile to provide your consent
  • If you need additional information on how-to change your T4A consent status, including alternate menu navigation, please refer to the “Quick Guide” or “User Guide” provided in the links in the section below.
  • If you withdraw your consent for electronic delivery, the change will only be effective for the subsequent annual production of T4A slips (i.e.: changing your status does not trigger an individual slip to be mailed at the time you update your consent status).
    • Important Note: In order to be able to view your T4A slip online in Mosaic, you must have provided your consent for electronic delivery.

To view your electronic T4 or T4A tax slip on Mosaic:

  • Use the drop down on your Mosaic Home page and select the “Employee Self Service” option
  • Click on the “View T4/T4A Slips” title to download your electronic T4/T4A slips.
  • If you need additional information on how-to access your tax slips online, please refer to one of the following helpful guides below.

Alternatively, to view your T4 or T4A tax slip on the Canada Revenue Agency (CRA) ‘MyAccount for Individuals’ website portal:

  • An additional option available to you is to access your T4 or T4A tax slip information directly from the Canada Revenue Agency’s secure ‘MyAccount’ website
  • CRA MyAccount help information
  • Please note, in order to set-up your login for CRA’s MyAccount to gain full access to your tax information, you will first need to receive a ‘CRA Security Code’ which the Canada Revenue Agency normally delivers to you via mail once you have completed the initial ‘MyAccount’ set-up steps.  For additional assistance in obtaining the ‘CRA Security Code’ you can phone the CRA’s “Individual tax enquiries” telephone support line:  1-800-959-8281 (Canada and United States)

Understanding your T4 or T4A tax slip(s):

  • Information to help you understand your T4 (Statement of Remuneration Paid), or your T4A (Statement of Pension, Retirement, Annuity, and Other Income), is available on the Canada Revenue Agency’s website

If replacement slips are required for any reason or you have any questions, please contact your HR Advisor or call us at 222-HR (22247). 

Quick Guide to accessing and printing online T4 and T4 slips

Viewing and Printing T4 or T4A Tax Slips issued by Human Resources – Quick Guide | PDF

User Guide to accessing and printing online T4 and T4 slips

Guide to Viewing and Printing Your Online T4 or T4A Tax Slip Issued by Human Resources in Mosaic  | PDF