Heat 1 tablespoon oil in large nonstick skillet on medium heat. Add corn; cook and stir 3 minutes or until heated through. Stir in 1 tablespoon of the Seasoning Mix. Transfer to small bowl. Stir in mayonnaise; set aside.
Heat remaining oil in same skillet on medium-high heat. Add chicken; cook and stir 3 minutes. Stir in remaining Seasoning Mix and water. Bring to boil. Reduce heat; simmer 3 to 5 minutes until chicken is cooked through, stirring occasionally.
Spoon chicken into warm tortillas. Top with corn mixture and serve with desired toppings.
