driving a good across the US border for repair / warranty replacement & duty/HST
Does anyone have an experience with DRIVING, not shipping goods across the border for the reason above? I'm hoping to make it across then restrictions lift, and I have two goods that I think I can get replaced at a Walmart on warranty as they were bought there, 1) a soundbar, 2) a KitchenAid mixer. I've declared both at the border at separate trips, the soundbar I had to pay HST/duty on and have the papers, the mixer I got waved through on.
I hope the return itself is effortless (and will push for credit rather than items, of course), but what's the best procedure on getting this without getting hit on the drive back? Should I declare the items when leaving Canada as repair/warranty and then re-declare it on my way back? Are there forms I need to fill? I can't really count on Walmart here as these weren't typical cross-border purchases.
Would appreciate any help / pointing me to your experience.