Your Checkout Adds a Number the Ad Never Showed
Texas sources a remote sale to the delivery address, and the state contains more than 1,500 local taxing jurisdictions. Two buyers in the same metro can land on different totals for the same cart. The state rate is 6.25 percent and the combined rate caps at 8.25, so the swing looks trivial until you remember where it appears — at the final step, after the buyer has already decided. Delivery makes it worse, because in Texas a shipping or handling charge on a taxable item is itself taxable. A store advertising free shipping over a threshold and then billing handling has created a line nobody priced in. Two fixes move the conversion. Show estimated tax and delivery on the cart, before checkout, so the total never jumps. Then reconcile Merchant Center tax and shipping settings against what checkout actually charges, because a price mismatch between the ad and the landing page is a policy breach as well as a lost order.