This is our main tax information forum which deals with topics concerning Canadians living and working in the U.S., U.S. citizens contemplating working in Canada, and all aspects of Canadian and U.S. income tax and related adminstrative issues.
For 2011 1040 tax filing, I had earlier taken bank of Canada rate of 1 C$= 1.011 US$.
Before filing my tax return, I noticed IRS rate of 1 C$= 0.972 US$. Not that it makes a big difference but surprised to note a 4 % difference in exchage rates.