Nolo permits up to four discount codes on a purchase. In the time of checking out, you can use the discount code to receive a subsidized price for your order. You can as well keep your eyes out for promotions and special offers that will provide up to 10% off your purchase. Also, Nolo has a 30% off their eBooks. But if you buy an eBook plus any physical book you can qualify for a 20% off your order. Note that Nolo coupons and discount codes have expiration dates, therefore make sure before they become invalid.