Preheat oven to 350 degrees F. Mix together cream cheese and sour cream in a large bowl. Mix in refried beans until combined. Stir in taco seasoning.
Spray a 9x13-inch baking dish with cooking spray. Spread bean mixture evenly into the bottom of the baking dish. Sprinkle the top evenly with both cheeses.
Bake, uncovered, for 25 to 30 minutes or until cheese in melted and bubbly. Serve with tortilla chips. Enjoy!