Sales tax in Canadian provinces, except Alberta, are all double-digit. 13% currently in Ontario. That's down from 15% a couple of years ago. 8% is provincial and 5% is federal. You'll pay this on pretty much anything.

Alcohol tax and gasoline tax is quite a bit higher than in the US. Especially alcohol tax in Ontario. There are two places to get alcohol in Ontario. "The Beer Store" and the "Liquor Store." It's cheaper to buy Canadian Whisky in the US than it is here. As an example, a bottle costing around $40-50 here can be bought across the border for about $9. There are booze-buying bus tours that make 3-hour return trips (free of charge) for people to stock up.

The WikiPedia page was pretty clear to mention Canadian provincial taxes needed to be calculated separately but I didn't see anything for US state taxes at the top. I haven't (ever) seen anyone mention that income tax in any state of the US is lower than Ontario (or anywhere in Canada for that matter).

We even pay tax on stamps over and above the face value of the stamp.

Also, in addition to federal and provincial taxes, there are also Canada Pension Plan and Unemployment Insurance deductions at source. What we don't have to pay any tax on however are lottery and contest winnings. But that's mainly because our lotteries are all run by the government and they keep back a huge amount prior to deciding how much the prizes will be.