Mix cream cheese & sour cream together until smooth. Spread on a large platter. Sprinkle 1/2 of the package of taco seasoning mix over top. Take crumbled cooked ground beef and sprinkle over top of cream cheese layer. Take chopped vegetables and mix in bowl. Layer over beef. Sprinkle rest of taco seasoning mix over top. Layer chedder cheese next. Then 1 tablespoon of sour cream in middle of top. Sprinkle with black olives. Chill at least 1/2 hour. Serve with chips for dipping.