Prepare the chicken by shredding leftover cooked chicken or cooking chicken breasts until fully cooked and shredding them.
In a skillet, heat olive oil over medium heat, add shredded chicken, and sprinkle in chili powder, cumin, garlic powder, onion powder, salt, and black pepper. Stir until well-coated.
Cook the chicken mixture for about 5 minutes, stirring until heated through.
Warm the tortillas in a skillet or microwave, then assemble tacos with seasoned chicken, shredded lettuce, diced tomatoes, cheese, and sour cream. Serve with lime wedges.