Step 1: Preheat your oven to 375°F (190°C).
Step 2: In a large skillet over medium heat, add the ground beef and cook for about 5-7 minutes until browned.
Step 3: Drain excess fat, then stir in the tomato sauce and taco seasoning. Let simmer for 2-3 minutes.
Step 4: Arrange taco shells on a baking sheet, fill with beef mixture, and top with cheddar cheese.
Step 5: Bake for 10-12 minutes until cheese is melted and shells are golden brown.
Step 6: Prepare toppings like lettuce, pico de gallo, corn salsa, sour cream, and guacamole.
Step 7: Serve and enjoy by letting everyone build their own tacos.