If the turkey has been fully thawed it can be safely kept in the refrigerator for up to 3 days once thawed.
If the turkey is frozen when you put it in the refrigerator it should last for 4 to 6 days and if you plan to keep the thawed turkey uncooked for longer than 3 days you should freeze it again.
If you freeze the uncooked turkey it should keep for 1 to 2 years but may not be as fresh tasting as it was before.