Do enlightened beings again take birth?

Once the individual soul gets enlightened ( in the sense - liberated , moksha), it is no longer bound by any karmic laws. ( As long as there are desires - likes and dislikes there is karma) . A soul that is not liberated is bound my karmic laws and hence is bound to take birth. A liberated soul can take birth as per its will and not bound by any forced karmic laws. Many enlightened souls take birth to help humanity and to establish righteousness.