Preheat oven to 350 F. Brown ground beef in a large saucepan over medium heat, breaking it up with a spatula as it cooks. Drain grease and return meat to skillet.
Add in crushed tomatoes, diced tomatoes, kidney beans, salt, pepper, cumin and chili powder. Let mixture simmer over medium heat for another 10-15 minutes. Spread chili mixture out into a large greased baking dish.
Spread tater tots over the chili in one single layer. Sprinkle shredded cheddar cheese over tater tots. Bake for 40-45 minutes.