Personal tax return filing and payment deadline are on April 30 every year. Self-Employed and their spouses or partners have to file the tax return on or before June 15 every year. However, any taxes payable must be paid on or before April 30. Taxpayers should file their income tax return on time to avoid any delays or interruption in Canada Child benefits, GST/HST credits, GIS supplement and other applicable government payments. Even if you are expecting tax refunds, delaying more than three years could result in loss of potential tax refunds.