Heat a large pot over medium heat and add the ground beef. Cook, breaking it apart with a wooden spoon, until browned and cooked through, about 5-7 minutes. Drain excess fat if desired.
Add the diced tomatoes (with juices), black beans, corn, chili powder, cumin, and a pinch of salt to the pot. Stir everything together to combine and bring to a simmer.
Reduce the heat to low and let the soup simmer uncovered for about 15-20 minutes, stirring occasionally. The flavors will meld, and the soup will thicken slightly.
While the soup simmers, prepare your toppings: shred the cheese and crush the tortilla chips for garnish.
Once the soup has thickened slightly and the flavors taste balanced, ladle it into bowls. Top each with shredded cheese and crushed tortilla chips.
Serve hot and enjoy the hearty, flavorful bowl of taco soup with your favorite side or additional garnishes.