In a bowl, combine turkey, 1/2 cup sour cream, 1 1/2 teaspoons taco seasoning, half of the soup, 1 cup of cheese, onion, salsa and olives. Place 1/3 cup filling on each tortilla. Roll up and place, seam side down, in a greased 9 x 13 baking dish . Combine remaining sour cream, taco seasoning and soup; pour over tortillas. Cover and bake at 350 F. for 30 minutes or until heated through. SPrinkle with remaining cheese. Serve with shredded lettuce and chopped tomatoes. Top with additional salsa if desired.