Hello and Happy Thanksgiving,
You need to cook the turkey at 350* F at approximately 22 mins per pound. If the turkey is stuffed add some time;
If stuffed 4-4 1/2 hours for a 15 pound bird.
Unstuffed is 31/2- 41/4 hours 15 pound bird.
I hope this helps and enjoy your dinner!
Enjoy your turkey! Please do not forget to hit the accept button and positive feedback would be welcomed! Joan