Preheat your oven to 350°F (175°C).
In a bowl, mix the cooked chicken, sour cream, and cream of chicken soup.
Add garlic powder, onion powder, salt, and pepper to the mixture.
Warm the tortillas slightly to make them pliable.
Fill each tortilla with the chicken mixture and roll them up.
Place the rolled tortillas seam-side down in a baking dish.
Pour the enchilada sauce over the top of the tortillas.
Sprinkle the shredded cheese over the sauce.
Bake in the preheated oven for 25 minutes until bubbling and golden.
Garnish with chopped green onions and tomatoes before serving.