Today only, Dollar General takes 20% off sitewide with no minimum purchase required. (The discount applies in-cart.) That's tied with our June mention as the largest percent-off coupon we've ever seen from Dollar General. (For further comparison, it only offered 15% off sitewide on Black Friday last year.) Shipping starts at $4.95, but orders of $40 or more qualify for free shipping. Sales tax is added where applicable.