In a 6-quart crockpot, place the chicken breasts, black beans, corn, onion, diced tomatoes with green chilies, chicken broth, taco seasoning, and garlic salt.
Cover and cook on low for 6-8 hours, or on high for 3-4 hours, until the chicken is cooked through and tender.
Remove the chicken from the crockpot and shred it before returning it to the pot.
Add the diced cream cheese to the crockpot, stirring to combine. Cover and continue cooking on low for an additional hour, or on high for 30 minutes, until the cream cheese is fully melted and incorporated.
Serve hot with your choice of taco toppings.