Place the chicken breasts in the slow cooker.
In a medium bowl, mix the salsa, taco seasoning, garlic powder, onion powder, cumin, chili powder, salt, and pepper. Pour this mixture over the chicken, ensuring it is well coated.
Cover the slow cooker and set it on low for 6 hours.
After the cooking time is complete, shred the chicken using two forks and mix it with the sauce in the slow cooker.
Warm the tortillas in a skillet or microwave.
Assemble the tacos by placing the shredded chicken mixture on each tortilla.
Top with shredded lettuce, diced tomatoes, cheese, sour cream, and cilantro as desired.
Serve the tacos immediately and enjoy!
Feel free to customize the toppings based on personal preferences, such as avocado, jalapeƱos, or hot sauce.
Store any leftovers in the refrigerator for up to 3 days, or use the chicken mixture for burrito bowls or nachos.