There is no doubt, that unlike the old visa application system, the travel authorization application must be done online. It is very important for you to deal with your online application as soon as you plan a trip to Canada. Make sure that your every travel have an official ETA. it s very important for everyone to understand that the children will also be taken into consideration as it is a new requirement.
https://www.eta-official.co.uk/

ETA Canada Visa Application – Electronic travel authorization Canada
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