If your son's return was filed without checking the box that said he could be claimed as a dependent, then his return will have to be amended after it has been fully processed. But you do not have to wait for him to amend. The only way you can file now is by mail. You put his SSN into the system and it will be impossible to e-file another return using his SSN. Print, sign and mail your own return that claims your son as a dependent.
When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS/state received the return.
Federal and state returns must be in separate envelopes and they are mailed to different addresses. Read the mailing instructions that print with your tax return carefully so you mail them to the right addresses.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
