SIMA charge on Amazon.ca FBA import?

I just sent a shipment into Canada after years of not stocking there. I am the brand owner in manufacturer of my product.

I put the wholesale price for my product even though I was shipping it to myself. Was I supposed to put the retail price on amazon.ca?

My bill from UPS brokerage included a large charge for: The Special Import Measures Act (SIMA) is Canada’s law that protects domestic industries from injury caused by dumped or subsidized imports.

I do have a Canadian business entity number but have never filed tax returns to get any of my import charges refunded to me because I don’t know how and it’s always been a small number.