Combine dressing with melted butter, celery, and onion; stir in liquid broth; mix well.
Stuff loosely in neck and body cavities of a turkey, allowing for expansion during roasting.
Skewer or sew turkey closed. Roast as usual. Roasting times will vary depending on the size of the turkey.
To prepare as a casserole, place stuffing in a greased baking dish, and bake on middle rack of preheated 350°F oven for 45 minutes until internal temperature reaches 165°F.