Preheat oven to 400℉.
Grease a 9x9 baking dish. Layer 4 tortillas in the bottom.
In a large bowl, mix chicken, black beans and taco seasoning.
Top with ½ chicken and black beans. Pour ⅓ sauce over and then sprinkle ⅓ of the cheese on top.
Layer 4 more tortillas. Top with the remaining chicken & black beans. Pour ⅓ of the sauce on top, and then sprinkle with ⅓ of the cheese.
Top with remaining 4 tortillas. Pour remaining sauce over & sprinkle with remaining cheese.
Cover with foil and bake for 30 minutes until cheese has belted and sauce is bubbling.