Shah Az

I found this thread very helpful but I got some questions. 1- I am Canadian, got graduate (Masters) scholarship (Fulbright) in US School 2014-16. I recieved monthly stipend and tution waiver (actually paid by US Govt under Fulbright GRANT). However, I reported only stipend as income in US (as per my Tax consultant Advice). The stipend I recieved were already taxed and my tax was filed in US by the Grant Office on my behalf. When I reported my income to CRA, I was charged tax payable (CAD 900 in 2014, CAD 1500 in 2015) which I paid and for 2016 I am expecting similar amount to be paid. I don't understand, when I was taxed in US, why do I need to pay taxes in Canada. i have 2 kids (under 6) and my wife is household. Any advice ? Regards Shah