Can you find out who used my child's Social Security Number?

If you suspect that someone is illegally claiming your child as their dependent on their tax return, you should contact the IRS by calling 1-800-829-1040. If you suspect that someone claimed your child illegally in order to obtain money provided through the Earned Income Credit provision on his or her Federal return, you should contact the IRS Fraud Hotline at 1-800-829-1040.