SSN is a must have. You cannot file a tax unless you have SSN. You have to be very careful while filling the turbotax. Make sure you read each and every fine lines while answering the question. If you supplied a wrong information IRS might give you a hard time. BUt I am not a tax export. I am saying on the basis of what I have see. Make sure you consult with a Tax people like H & R block or other tax agent. They might be able to help you. Don't take this matter lightly. It might get serious if something goes wrong.