During last 20 minutes of cooking, make taco shells: Separate dough into 16 biscuits. Sprinkle flour on work surface; press or roll each biscuit to form 6-inch round. In 12-inch skillet, heat 2 tablespoons of the oil over medium-high heat. Add 2 biscuit rounds to skillet; cook 1 minute on each side or until light golden brown. Repeat with remaining biscuit rounds, adding more oil as needed.