Have your step-father call the identity theft phone number, 1-800-908-4490. I had my first ever id theft issue with a new client, and she called on a Saturday and got through in a short amount of time, was able to verify her identity over the telephone, and the agent confirmed that someone had tried to file a return with her SSN. In your father's case, the IRS system may have picked up on something on that 1040A that stopped the processing of the fraudulent return. They will still have to paper file, but hopefully this will not be that difficult to resolve.