Season chicken with 1 tablespoon of taco seasoning.
Heat olive oil in a large skillet over medium-high heat. Add chicken to the pan and cook for 2 to 3 minutes per side. Remove chicken from the pan and set aside.
Add orzo pasta, chicken broth, enchilada sauce, Rotel, and remaining taco seasoning to the skillet. Bring to a boil. Cover the pan and cook for 15 to 20 minutes, until the pasta is tender and the liquid is absorbed.
Add sour cream, corn, black beans, shredded cheese, and cooked chicken to pan. Stir well. Cook for 3 to 5 minutes, until warmed through.