You are posting on an old thread, so I'm unsure what your question is exactly.
If someone else already claimed your dependents, your e-filed return will be rejected. You will need to Print, sign and mail your own return, which claims your dependents. Mailed returns are processed differently by the IRS. It will take some time, but eventually the IRS will contact both parties and sort out who could rightfully claim the dependent. The person who wrongfully claimed the dependent will face repayment of refund $, plus penalties.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
