In a large cast-iron or other heavy skillet, cook beef over medium heat until no longer pink; drain. Stir in taco seasoning; remove from skillet and set aside. Wipe skillet clean. , In a small saucepan, cook refried beans over medium-low heat until heated through, 2-3 minutes. , Spoon about 1/3 cup of beans off-center on each tortilla; top with 1/4 cup beef mixture. Sprinkle with cheese. Fold sides and ends of tortillas over filling and roll up., In same skillet over medium-high heat, brown burritos in oil on all sides. Serve with sour cream and salsa.