Grease a 13 x 9-inch casserole dish or a 3-quart oval baking dish.
In a large skillet cook the ground beef with onions, garlic, green bell pepper and jalapeno pepper until completely cooked; drain fat then add in taco seasoning mix (you may add in more than 2 tablespoons if desired) cook stirring for 2 minutes, then season with salt and pepper to taste, remove from heat then mix in salsa, corn and sour cream.
Place HALF each of the ground beef mixture, black beans, 2 cups tortilla chips then 1-1/2 cups shredded cheese (or to taste).
Repeat with remaining ground beef, beans and then 2 cups crushed tortilla chips, leave the remaining 1-1/2 cups cheese to sprinkle on top the last 5 minutes of cooking.
Bake at 425 degrees for about 20 minutes or until just heated through.
After cooking sprinkle the remaining shredded cheese on top, you can return to oven to melt if desired.