You sign and give him a form 8332 which allows him to take the exemption for his son, but NOT to receive EITC, under special rules for children of divorced or separated parents, since child lives with you, not with him. All those answers saying NO are WRONG.
He is paying child support--thank heavens he is doing that
You then still could receive EITC for the child if you had worked and your income qualified, but as you didn't, no one qualifies to receive EITC for your child
Why NOT work with him, and give him this, when he is paying child support--so many don't
Why create more strife and animosity between the two of you???
It's the fair and Christian way to work with your baby daddy, and doesn't HURT you at all.
You chose to have his baby, and now you have to deal with him for at least 18 years!