For 2020, there is no stimulus money for dependents over 16. The first two dependent stimulus payments ($500 and $600) were only for children under 17.
The third stimulus ($1400) is for all dependents, regardless of age, but is technically for tax year 2021. If you file a 2020 return, claiming your daughter, there's a chance the IRS will send you a $1400 deposit (separate from your own 2020 stimulus/refund). Otherwise, you will have to claim it when you file your 2021 tax return AND she must still be a dependent in 2021. If she is not your dependent, in 2021, she will will be able to claim the $1400 by filing her own 2021 tax return (in early 2022).
References:
https://www.nytimes.com/live/2021/03/06/business/stimulus-check-plan-details#when-will-stimulus-chec...
https://ttlc.intuit.com/community/tax-topics/help/how-will-the-stimulus-package-impact-me/00/1393859
