Preheat your oven to 350°F (175°C). Lightly grease a 9x13-inch baking dish.
In a large bowl, combine the shredded chicken, cream of chicken soup, sour cream, salsa, green chiles, corn, and taco seasoning. Stir well until fully combined.Layer half of the crushed tortilla chips (or tortillas) in the bottom of the baking dish. Spoon half of the chicken mixture over the chips and spread evenly.
Sprinkle with 1 cup of cheese. Repeat with the remaining chips, chicken mixture, and top with the remaining 1 cup of cheese.
Cover with foil and bake for 20 minutes. Remove the foil and bake an additional 10 minutes, or until the cheese is melted and the casserole is hot and bubbly.
Let the casserole rest for 5 minutes before serving. Top with your favorite garnishes like green onions, cilantro, or diced tomatoes.