Place chicken breasts in the bottom of your slow cooker.
Add cream cheese, salsa, 1 cup of the shredded cheese, taco seasoning, sour cream, and green chiles to the slow cooker.
Cover and cook on low for 4 hours, or until chicken is cooked through and shreds easily with a fork.
Shred the chicken directly in the slow cooker using two forks and stir everything together until well combined.
Top with the remaining 1 cup of shredded cheese, cover, and let cook for an additional 10-15 minutes until cheese is melted.
Serve warm with tortilla chips, and garnish with diced tomatoes, green onions, or cilantro if desired.