Will my taste-buds return after radiation treatment to face and neck?

Yes, usually.: Taste buds are very sensitive to injury from radiation therapy. The degree of damage depends upon the dose of radiation, which differs for various kinds of cancers and their location, and is very dependent as well on individual differences. The result can vary from near complete loss of taste that is permanent to near full recovery. The recovery is slow and can take a number of weeks.

Unknown: Unfortunately only time will tell. Some of the factors at play are: amount of radiation, location, individual patient response, extent of underlying disease. Best wishes.