If you claimed him as a dependent, he will not be eligible for a stimulus check. You would need to amend your return to remove him as a dependent.
Yes, you will also have to wait until your amended return is processed to register him using the Non-Filers portal. If you try now, you will get a rejection stating he was already claimed as a dependent if your return has been filed.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
