Do you have an Ancestry.com account? I did find census records for 1916 for Taszczuk. One set is for George, Helen and John. Another is for Metro, Sanchira (wife) and Basil (age 1). It only states they were from Bukowina, and that they immigrated in 1911 (but there can be many mistakes on these old census records).
I also found the passenger list when the family came over, under the name Tasczuk. The arrived on July 11, 1910 in Quebec on the vessel Montezuma, which left from Antwerp, Belgium. It does say there destination was Vegreville, but it does not say where they were from. Right after their 5 names is Tanasko & Maria Tasczuk (not the same Maria as George's daughter) and they are listed as "returned Canadians".
Leonard