Cook the pasta according to package instructions. Reserve 1/2 cup of pasta water, then drain and set aside.
In a large skillet, brown the ground beef over medium heat. Drain excess grease.
Add the taco seasoning, Rotel, and cream cheese to the skillet. Stir until the cream cheese is melted and the mixture is well combined.
Mix in the sour cream and shredded cheddar cheese. Stir until everything is creamy.
Add the cooked pasta to the skillet and toss to coat. Add reserved pasta water as needed for a smoother sauce.
Season with salt and pepper to taste. Serve hot, garnished with chopped parsley and extra cheese if desired.