Heat a large skillet over medium-high heat. Add ground turkey to the hot skillet; season with salt and pepper. Cook and stir until browned and crumbly, 5 to 7 minutes. Drain and discard grease.
Transfer turkey to a slow cooker. Add potatoes, carrots, and onion.
Mix together tomato soup, Worcestershire sauce, seasoned salt, and 1 teaspoon pepper in a large bowl; stir into the slow cooker until well combined.
Cover and cook on Low until vegetables are tender, 6 to 8 hours, or on High, 3 to 4 hours.