Thanks for the quick response.  For the past five years (since divorce), each of us has claimed one of the children as a dependent.  That changed last year (2019) when she claimed both because I was one month behind in child support.  I did not fight it and figured it was a one-time deal.  No 8332 form was signed at any point in the past - including for the only year that she claimed both children.   Both children live with their mother (my ex-wife) more than 180 days per year.  However, our divorce agreement states that each of us can claim one of the children as a dependent until the oldest can no longer be claimed by anyone.  At that point, we agreed to alternate claiming the younger child until she can no longer be claimed.     I guess I just cannot figure out how and why TurboTax knows that my ex-wife claimed both children last year and "does not allow" me to claim her as a dependent this year even though I answered all of the questions in such a way that she should be claimed as a dependent.   Any further help is much appreciated. ... View more