Preheat oven to 375ºF. Apply cooking spray or avocado oil to shallow, small baking dish.
Place chicken in baking dish and lightly apply taco seasoning to both sides, then pour salsa over chicken.
Bake 45 minutes, uncovered, until internal temperature reaches 165ºF.
Sprinkle cheese evenly over chicken. Bake 5 minutes until cheese melts.