Taxpayer's daughter was a full-time college student, living at home with parents, totally supported by parents, no income until 12/27/18 when she got married.  Daughter and new husband filed a joint return.  Pro Series ask the question can taxpayer or spouse be claimed as a dependent by someone else.  The filing status of MFJ and the box for spouse can be claimed as a dependent by someone else.  The return was calculated and filed.  When the parents filed their return claiming the daughter their return was rejected due to the filing status of the Joint return.  It is my understanding that a MFJ status cannont be amended to MFS status after the due date of 4/15.  It is also my understanding that a MFJ status eliminates the ability to be claimed as a dependent on another return.  Assuming my understanding is correct, why does Pro Series allow MFJ is one spouse can be a dependent on another return.