On a large round platter, thinly spread bean dip. In small bowl, mix sour cream, mayo and taco seasoning. Spread over bean dip. Sprinkle with jalapenos. Peel, pit and mash the avocados; add lemon juice and garlic powder; mix well. Spread over jalapenos. Sprinkle with cheese, onions, tomatoes and olives. Serve with baked tortilla chips.