I just compared my numbers to https://simpletax.ca/calculator https://simpletax.ca/calculator and they look pretty close. I checked the site you mentioned, and

I just compared my numbers to https://simpletax.ca/calculator https://simpletax.ca/calculator and they look pretty close. I checked the site you mentioned, and you're right, they are vastly different. I can't explain that with certainty, but perhaps its not deducting things like RRSP contributions which lowers the tax?