Preheat oven to 400 degrees F. Cover a baking sheet with foil. In a large skillet over medium heat, brown ground beef. Stir in salsa, juice from chiles and taco sauce, and simmer for 5 minutes. Lay pizza crusts on prepared baking sheet. Spread beans over pizza crusts.
Spread seasoned ground beef over beans. Cover with cheese. Bake for 10 to 12 minutes or until cheese is melted. Remove from oven and top with lettuce, tomato, and taco shell pieces. Mix half a packet of taco seasoning into sour cream and top pizzas. Serve hot.