Preheat oven to 350 degrees F. Spray an 8x8 baking dish with nonstick cooking spray.
Add the cooked chicken to a pan over medium heat. Stir in the taco seasoning and water. Cook 3-5 minutes.
Stir in the corn and black beans, then remove from heat.
Cut the four tortillas into four pieces each. Put one piece of tortilla in each of the corners and then a fifth one in the center.
Spread 1/4 cup of salsa over the tortillas and spread out evenly. Top with half of the chicken mixture and 1/2 cup of cheese.
Repeat that layer again, tortillas, salsa, chicken mixture, and cheese.
For the final layer add another layer of tortillas, top with salsa, then add 1 cup of cheese.
Bake at 350 for 20 minutes or until the cheese is melted.
