In a stockpot, place turkey carcass, water and broth. Bring to a boil. Reduce heat; cover and simmer 4-5 hours.
Remove carcass from stock. Remove any meat; dice. Return to stock along with rice, onion, celery, carrots, bay leaf and poultry seasoning. Add remaining seasonings to taste. Cover; simmer over medium-low heat until rice is cooked. Discard bay leaf. If desired, garnish with minced fresh parsley.