If an incorporate.com coupon code is not working, there could be several reasons. The code might not be valid for the items in the cart. Sometimes, promo codes are product-specific. The code might require a certain cart value. Some promos are only valid once a certain amount is spent. The item might already be on sale. Most of the time, discount codes don't stack and apply to items that are already on sale. The code might have expired. All coupons expire eventually. If the code still doesn't work after checking these factors, consider reaching out to incorporate.com's customer service for further assistance.