In a large skillet over medium high heat, saute chicken in oil until cooked through and no longer pink inside. Add taco seasoning, beans, corn, salsa and a little water to prevent drying out. Cover skillet and simmer over medium low heat for 10 minutes.
Preheat oven to 350 degrees F (175 degrees C).
Transfer chicken mixture to a 9x13 inch baking dish. Top with 1/2 cup of the cheese and crushed tortilla chips.
Bake in the preheated oven for 15 minutes. Add remaining 1/2 cup cheese and bake until cheese is melted and bubbly.