On Tuesday, April 28th, Taco Bell is offering FREE Doritos Locos Tacos at the drive-thru and NO purchase necessary!! Simply mention the offer at the drive-thru or order ahead through the Taco Bell website or app for drive-thru pickup orders, while supplies last. You can get one (1) Free Flamin’ Hot Or Nacho Cheese Doritos Locos Tacos for each person in your vehicle.