Preheat oven to 375°F (190°C) and grease a 9x13 baking dish.
In a skillet, cook ground turkey over medium heat until browned.
Add onion and garlic; cook until softened.
Stir in taco seasoning and water; simmer 3–5 minutes.
Add black beans, corn, and salsa; mix well and cook 2 minutes.
Layer half of the crushed tortilla chips in the baking dish.
Add half of the turkey mixture on top.
Sprinkle half of the cheese over the mixture.
Repeat layers with remaining chips, turkey mixture, and cheese.
Bake for 20–25 minutes until cheese is melted and bubbly.
Let rest 5 minutes before serving.
Add toppings and serve warm.