If parents have a yearly agreement to allow both parents to claim child family each year. If he claimed her in 2018 and I claimed her and my son(I have all rights to him) for 2019 will I get both cre

I've already file for 2019 claiming both my son and daughter for dependents,  but for 2018 due to the court agreement allowing both my ex-husband and I to follow by court orders to allow me to claim o