If someone else has used your dependent's SSN--even if by accident-- then you cannot e-file. You will have to print, sign and mail your tax return. The IRS will sort it out.
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.
(One thing---if your dependent is a teenager or student with a first job who filed a return--kids often mess up parents' returns by filing and saying they cannot be claimed as someone else's dependent. Is that a possibility for you?)
**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.**
