In a large skillet, cook the ground beef over medium heat until browned. Drain any excess fat.

Add the taco seasoning to the cooked ground beef and stir well to combine. Cook for an additional 2 minutes.

In a large mixing bowl, combine the shredded lettuce, diced tomato, diced onion, shredded cheddar cheese, and crushed tortilla chips.

Divide the taco meat among the serving plates. Top with the lettuce mixture. Serve with sour cream and salsa on the side.