Sprinkle 2 cups of the Doritos on the bottom of the baking dish
In a large bowl add the chicken, beans, sour cream, corn, rotel, green chilis, cream of soup, and taco seasoning stir everything together.
Spread the mixture on top of the Doritos in the baking dish. Bake for 25 minutes.
Sprinkle the rest of the Doritos (2 cups) on the casserole then sprinkle the cheese on the very top bake for an additional 10 minutes. Enjoy with your favorite taco toppings