If your E-filed return was rejected due to your son's social security number (SSN) already being used on another tax return, we don't have the information of who claimed him and aren't able to tell you who stole it.
If a tax return has been filed with your son's SSN, you won't be able to E-file your return but you can prepare the return with him as your dependent and mail in the return. The IRS will most likely contact you and the other party that claimed your son requiring additional information as to who can rightfully claim your son so be prepared to show proof.
For additional information, please see the following:
advice from the ICPA on what to do in case of identity theft
Organization What to Do
Credit Agencies
1) Report the identity theft to the fraud department of one of the following reporting agencies as soon as possible. They must notify the other two agencies.
2) Request a copy of your credit report and request that only the last
four digits of your Social Security number be placed on the report.
3) Close accounts that you think have been compromised or opened
fraudulently.
4) Inform the credit bureaus and the credit issuers (in writing) of any
fraudulent accounts and incorrect information.
5) Obtain replacement credit cards with new, secure account numbers
and destroy any old cards.
6) Notify those who have received your credit report in the last six
months to alert them to any disputed, fraudulent or incorrect information.
7) Confirm that an extended fraud alert (seven years) is placed on your
credit report.
Federal Trade Commission (FTC)
1) Report the crime to the FTC to establish an Identity Theft Affidavit.
Identity Theft Victim’s Complaint and Affidavit.
Local Police
1)Report the crime to your local police or sheriff’s department. Make
sure to prompt as much documented evidence as possible.
2)Verify that the report lists the fraudulent accounts and keep a copy
of the report.
Internal Revenue Service (IRS)
1) Contact the IRS to report the theft. This will alert them to any claim
for refund or other activity on your account. File IRS Form 14039,
Identify Theft Affidavit.
State Tax Agency
1) Contact your state tax agency to report the theft. Some agencies
may require a police report and/or the IRS affidavit.
Other Agencies and Organizations
1) U.S. mail fraud: Contact your local postal inspector.
2) Social Security number misuse — non-IRS issues:
-Check your earnings record to make sure no one is using your SSN
to obtain work. Call your local Social Security Administration (SSA)
office if something looks inaccurate.
-Contact the SSA Inspector General to report Social Security benefit
fraud, employment fraud, or welfare fraud.
- socialsecurity.gov/oig
- Fraud Reporting Form