In a skillet, cook the ground beef over medium heat until browned and crumbled. Drain excess fat.
Add the taco seasoning and stir to coat the beef.
In a large bowl, mix the cream cheese and sour cream until well combined.
Stir in the cooked beef, cheddar cheese, black beans, pinto beans, corn, and diced tomatoes with green chilies.
Gently fold in the diced avocado.
Transfer the dip to a serving bowl and serve with tortilla chips.
