Lindsey answered on 3.28.16:
Whether you shop in-store or online, Home Depot offers a very forgiving return policy. The hardware retailer accepts most merchandise within 90 days of purchase for a refund or exchange.
Additionally, you can extend the time frame to 365 days if you use a Home Depot Consumer Credit Card, The Home Depot Commercial Revolving Charge Card, or The Home Depot Commercial Account at checkout.
With a lengthy return policy like this, you shouldn’t hesitate about ordering online and can even use our Home Depot coupons to save extra cash.
Some exceptions apply—custom products, gift cards, and utility trailers are non-returnable—and other Home Depot merchandise must be returned within 30 days, like damaged items, generators, consumer electronics, furniture, and gas-powered equipment and tractors
To return your online purchase, you can either bring your merchandise to any Home Depot store location or mail them to Home Depot’s warehouse. (You’ll have to contact Online Customer Support at 800-430-3376 to get the return address.)
You must fill out a return form and pack up all items (including original packaging) to send your merchandise back by mail. Once your return is received and processed by Home Depot, you’ll receive a refund on the credit or debit card you used to pay for the order.