You should first determine the type of Canada visa you require. In addition to that, you also need to confirm if you need to apply for an eTA. eTA is essential for boarding a flight to Canada even if you are transiting your flight through Canada. Plan you eTA well in advance to avoid any last minute hassles. You can also apply for an extension of your visitor, student or worker visa within 90 days of the Canada visa expiry date and also submit applications for your family members. For more details visit http://www.canadavisa.ae.