I personally would let it thaw overnight..it would not totally thaw but they really freeze those turkeys extremely. Then I would cook it frozen. Lots of google ideas and assurances of safety. Cook longer and lower temp. Check for doneness. Don't serve it if it is not totally unequivocally done. Have a backup plan. I don't like OCD turkeys. I never thaw meat...just cook it frozen. Have ER on speed dial.