Brown ground turkey in a large skillet over medium-high heat; set aside.
Cook macaroni and cheese according to directions on package.
In a large bowl, stir to combine macaroni and cheese, cooked ground turkey, pimentos and corn and transfer to 3-quart casserole dish. Crumble tortilla chips over top and sprinkle with Cheddar cheese. Place in oven and bake for 30 minutes.
Remove from oven and let cool for 5 minutes before serving.