Heat oven to 350°F. Spray 13x9-inch (3-quart) glass baking dish with nonstick cooking spray. Cut opening in one side of each chile. Carefully remove seeds and membranes, leaving top stem intact; rinse and drain well.
Spray large skillet with nonstick cooking spray. Add ground turkey; cook over medium-high heat for 7 minutes or until no longer pink and thoroughly cooked, stirring frequently. Add taco seasoning mix; mix well. Add beans, corn and 1 cup of the cheese; mix well. With small spoon, stuff chiles with turkey mixture. Place in sprayed baking dish. Lightly spray tops of chiles with cooking spray.
In small bowl, combine tomatoes and green chiles; mix well. Pour over stuffed chiles in baking dish.
Bake at 350°F. for 30 to 40 minutes or until chiles are tender. Sprinkle with remaining 1 cup cheese. Bake an additional 3 minutes or until cheese is melted.