Possible claim mistake with ex-husband
Needing help guys!! We have a 50/50 divorce settlement--no child support, 50/50 scheduled parenting time, and we each alternate years on claiming her with our taxes. I claimed her for 2019 (my year) and he was supposed to claim her for 2020. I didn't realize I filled it out wrongly when I filed my taxes back in the spring this year, so I claimed her for 2020 as well (so it looks like I claimed her two years in a row). He is filing his taxes late and he brought this to my attention when it wouldn't allow him to claim her. What do I need to do to fix my mistake? I will make a note mentioning that even though our settlement says 50/50 parenting time, looking back at our calendar and the days that he canceled on his parenting days--I have had her more days than he did for that year. We have a high conflict situation, so I'm fearful this could get ugly very quickly.
What should I do?