It is ‘good’ until it is changed or revoked in the manner required by law. Your will may be changed as often as you desire while you are sane and not under undue influence, duress or fraud, provided it is changed in the required manner. Changes in circumstances after the execution of the will, such as tax law amendments, birth of children, deaths, marriage, divorce, or even a substantial change in the nature or amount of your assets, may raise questions as to the adequacy of your will. All changes require a careful analysis and reconsideration of all the provisions of your will and may make it advisable to change the will to conform to the new situation.