Place the chicken breasts at the bottom of the crockpot.
Add the diced tomatoes, diced tomatoes with green chilies, chopped onion, bell pepper, minced garlic, and chicken broth to the crockpot.
Sprinkle the chili powder, cumin, paprika, garlic powder, onion powder, salt, and pepper over the ingredients in the crockpot.
Stir everything together to combine the seasonings.
Cook on low for 6-8 hours or on high for 3-4 hours until the chicken is cooked through and tender.
Once the chicken is cooked, shred it using two forks either in the slow cooker or on a plate. Return the shredded chicken to the slow cooker and stir to combine.
Taste the soup and adjust the seasonings if needed.
Serve the Crockpot Chicken Taco Soup hot, garnished with your favorite toppings like avocado, shredded cheese, sour cream/greek yogurt, and cilantro.