Hello, I understand that you are curious about a turkey's sense of smell and I'd like to help.
Turkeys, like most birds, have a very poorly developed sense of smell and taste. The part of the brain responsible for interpreting smell is extremely small.
This is likely an evolutionary change. Given that they are prey items it is much more important for them to see and hear well to avoid being eaten then to be able to taste or smell well.
Let me know if you have any further questions.