Anyone ever had to pay tax?

HTC seems like they’re going downhill. First the whole thing with the coupons for the pretzels and bread, now I noticed they’re requiring a lot of social posts but you don’t even know what you’re getting so who would agree to that? Anyway, I got accepted for some dog treats that I have to buy on Amazon and use a coupon but it doesn’t cover tax. Why should I have to pay it, even if it’s $1? I’m not trying it be cheap but I don’t need the product necessarily so I feel like that should be their responsibility 😂