On Walmarts In-Store Offers page, clip the desired coupon by checking the box in the lower right hand corner.
Add as many coupons as you wish, and click Print Coupons in the top right corner.
This will open the print function in your browser. You will need to install the coupon printer if it is your first time using this method. Print the coupon and present it at the checkout of your local Walmart store.