How old is she? If she was under 24 on Dec 31 you can still claim her. She will have to file her own return for her income. As stated in the answer below she will have to check the box on her return that says she can be claimed on someone else's return.
The Online version is only good for 1 return. But you can use the same email address for 5 accounts. To do another return you have to set up a new account and new user name and pay any fees again.
How to start another return in the Online version
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Here's an article on filing requirements for children
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