If you mean your daughter does not show as your dependent, you can correct that by revisiting the Personal Info tab. Scroll down to edit the dependent information and go back through the questions. If your daughter was living away at college but your home was her permanent home, the time she lived away at school counts as time lived with you.
If you filed your return with incorrect information on it, and it was accepted. you would have to file an amended return now to make this change. Amended returns are filed on paper and it takes the IRS 6-12 weeks to process them. Don't mail the amended return until you have your refund from the original return. Here are amend instructions. Don't make changes in the filed return until you're ready to amend.
https://ttlc.intuit.com/replies/5567856
If your refund is rejected on the original filing, you could just make changes and refile.
