eTA Canada. Where do I start?
To apply you must have a valid passport, a credit card (Visa, MasterCard, American Express, or a pre-paid Visa, MasterCard or American Express), and an email address. Once you have this information your Canada eTa application can be started on this website.
Start here https://etacanadaonline.com/ . You simply need to complete the eTA form online. Once issued, a Canadian eTA is valid for 5 years (for multiple trips) or until your passport expires. The entire process is simple. This infographic offers a step-by-step guide