Yes she has to file her own return for it. When did she turn 19? Was she a full time student? If she was 19 on December 31 and was not a full time student in 2023 you can not claim her anymore.
Online is only good for one return per account. You can use the same email address for 5 accounts. They can probably use the Free Edition. How to start a new online return
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-onli...
