In a large skillet, cook beef over medium heat until no longer pink, 6-8 minutes, breaking into crumbles; drain. Stir in tomatoes, corn, rice, water, taco seasoning and salt. Bring to a boil. Reduce heat; simmer, covered, until rice is tender and mixture is slightly thickened, 8-10 minutes.
Remove from heat; sprinkle with cheese. Let stand, covered, until cheese is melted, about 5 minutes. Divide tortilla chips among 6 plates; spoon beef mixture over chips. Serve with toppings as desired.
