Follow directions on taco seasoning packet to prepare beef (add onion to beef); drain fat and hold warm while heating up remaining ingredients.
Deep fry tater tots according to package directions; drain.
Meanwhile heat refried beans until hot.
When ready to assemble, place tater tots on a large platter and top with taco meat, refried beans, cheddar cheese then top with lettuce. Sprinkle tomatoes and green onions on top. Serve immediately with sour cream and salsa.