Preheat the oven to 400 degrees.
Lay one layer of tortilla chips on the sheet pan.
Sprinkle half of the chicken, cheddar, Monterey jack, jalapeños, black beans, and tomatoes.
Add another layer of tortilla chips. Repeat the same process—evenly spreading out the toppings except for the taco sauce and sour cream.
Bake in the oven for 10 minutes, or until the cheese gets nice and melty—almost crispy.
Drizzle the taco sauce on top. Add dollops of sour cream and serve!