You are responsible to follow the same laws and pay the same tax when selling your home, regardless of the reason for the sale. As mentioned, you may qualify to exclude part of the gains based on the 2 year/5 year rule. If you are in the military or foreign service, you get an extension on the time to sell, but whenever you do sell, you follow the same laws on capital gains as everyone else. There is no special treatment for moving overseas.
