Celebrate National Taco Day with Taco Bell! Last year Americans ate over 4.5 billion tacos! Get a Free Crunchy Taco with a $1 purchase on the Taco Bell app on October 4. The reward on the app is valid for a free Seasoned Beef Crunchy Taco with any food or drink purchase of $1 or more at participating locations. It is not available with a delivery order.