Cook the ground beef, onion, and green pepper in a large pot until the meat is brown and cooked through. Drain off any excess fat, then place back on stove and add the taco seasoning, stir until combined.
To the pot, stir in water, tomatoes, beans, tomato sauce, and corn.
Simmer covered for 15 minutes (or longer if you prefer).
Pour into bowls. Serve with preferred toppings.