In 10-inch skillet, mix turkey, beans and taco seasoning mix. Heat to boiling over medium-high heat, stirring occasionally.
Separate or cut dough into 2 long rectangles. Place in ungreased 12x8-inch (2-quart) glass baking dish; press over bottom of pan to form crust (if using crescent rolls, press perforations to seal). Spoon turkey mixture evenly over dough; sprinkle with cheese.
Bake at 375°F 15 to 20 minutes. Top with sour cream, if desired.