Preheat the oven to 350 degrees F.
Spray a casserole dish with cooking spray. Set aside.
Combine the shredded chicken, soup, sour cream, tomatoes and green chiles, beans, and taco seasoning in a mixing bowl.
In the sprayed casserole dish, layer the chicken mixture with tortilla chips and cheese. Cover with aluminum foil.
Bake the casserole for 30 minutes. Remove the aluminum foil and continue to bake until the cheese begins to bubble, about 10 minutes.
Remove the casserole from the oven.
Sprinkle the casserole with garnishes prior to serving.