Wrong. NAFTA doesn't apply to everything (ie. booze and smokes). What you can bring in, how much of it you can bring in, and what taxes and duties you pay depend on the items, as well as the length of your visit. And even if there are no duties, you may still have to pay GST. Best bet for info is Canada Border Services Agency, http://www.cbsa.gc.ca
I understood that unless you were gone 24 hrs+ then you are not entitled to any exemption. having said that we did back to school shopping for 3 hours in Buffalo and declared $285 on the way back and we were waved through. I thought we would be stopped as there were only 3 other cars.
And yet others say they get dinged pst & gst.?????
Children's clothes are exempted - and even if they were to stop you and charged you on everything you bought (highly unlikely) the total bill if you paid GST and PST would only be about $40 - based on price differences still a bargain and if you shop during the state Tax free months - usually back to school time - no state tax- score!