
Heat a large skillet over medium heat. Add the ground beef. Cook, stirring to break beef into small crumbles, until browned, about 8 minutes. Drain off any excess fat from the skillet, if necessary.
Add the tomato sauce, chili powder, cumin, salt, oregano, black pepper, garlic powder, and onion powder. Bring to a simmer over medium. Reduce the heat to medium-low, and cook, stirring often, until the sauce is thickened and the beef is well coated, about 2 minutes.
To assemble, spoon about ⅓ cup of the seasoned ground beef onto each warm tortilla. Serve with desired toppings.