I have two children with same father however we have never been married. Both children live with me full-time however this last year dad moved in for a year to try and work things out again. This didn't work out so he is moving out again for the last time.
He is threaten to claim our 8 month old with his taxes this year and going forward. We have never gone to court for custodial rights therefore he technically does not have any. As I stated before both kids have always lived with me 100% of the time.
Can he claim the kids legally? If he does do I have any recourse? How can I prevent him from claiming them? If he files before me and claims one of the kids how would I prove or notify IRS of his actions?