Preheat oven to 400 degrees F.
Prepare Velveeta dinner as directed. While macaroni is cooking, cook meat with taco seasoning as directed on package.
Stir sour cream into prepared Velveeta dinner. Spoon 1/2 dinner mixture into 8 inch square baking dish. Top with meat mixture, 1/2 of cheddar and remaining dinner mixture. Cover.
Bake 15 minutes; top with salsa, remaining cheddar and crushed chips. Bake uncovered 5 minutes.
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