Preheat oven to 350°.
Cook the turkey, onion, and water in a large nonstick skillet over medium-high heat until browned, stirring to crumble. Add chili and taco seasoning; reduce heat and simmer 10 minutes or until heated thoroughly.
Line a 13 x 9-inch baking pan with chips. Spoon turkey mixture over chips; top with cheese. Bake at 350° for 10 minutes or until cheese melts. Sprinkle with chopped jalapeño, and cut into 6 wedges; serve with salsa.