if i spent a year in canada would i have to pay double taxes?
 

would i have to pay us and canadian taxes for the income earned while living in canada?

no, talk with a tax accountant

Shemp put it well.

Im a Canuck who lived in coloarado for a few years during the dot-com, there are treaties against double taxation, but it can be messy to decide WHICH country to pay taxes in. Let your accountant figure it out for you.

A good accountant is THE solution :thumbsup