Solved
My daughter who lives with me claimed herself so I wasn't able to. She is 18. Will I be able to next year?
You can still claim her if she is your dependent. She will need to amend her return and select that someone can claim her as a dependent since she is your dependent. You can go ahead and add her as your dependent as long as she qualifies. You would just need to mail your return since her social security number has been filed electronically for the year.
WAIT until you receive your refund and then Amend.
Follow these steps to amend: https://ttlc.intuit.com/replies/3288565
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.