I disagree.
Under the special rules for children of divorced or separated parents, once a child is emancipated under state law, they are treated as living with neither parent. That's probably their 18th birthday, although you may want to check the laws of your state. See IRS publication 501 page 13-14. https://www.irs.gov/pub/irs-pdf/p501.pdf
If the child actually physically lived with you more than half the nights of the year (or if she turned 18 in 2019, if she physically lived with more than half the nights before her birthday) then you could use the normal rules to claim her as a dependent. But you can't use the rule about "where she would have lived but for a temporary absence" because that rule can't be used for children of divorced or separated parents who are emancipated. You need to indicate she does not live with you and she does not qualify you to file as HOH.
