Heat a large skillet over medium-high heat. Cook and stir turkey and onion in the hot skillet until turkey is browned and no longer pink, 5 to 7 minutes. Add corn, black beans, tomatoes, red bell pepper, lime juice, garlic powder, chili powder, and cumin. Reduce heat to medium-low and simmer until flavors combine, 15 to 20 minutes.

Place tortillas on a microwave-safe plate. Heat in the microwave until warmed, 15 to 20 seconds. Divide turkey mixture over the warmed tortillas.