At Costco, the card you take off the display rack says "exchange this for product code - see cashier." Don't ignore this! Once you have checked out, paid for your Costco purchase(s) and obtained your receipt, take the receipt and the display card to the nearby Costco rep, who will exchange the card for a product card. Do this before you leave the store. At home, open the product card and pull off the tab inside. Extract the "Welcome to Turbotax!" insert, which will have the 16-digit product code prominently displayed. If for some reason you left the store without exchanging the cards, take your display card and receipt back to Costco.
