Not necessarily. Since your daughter did not become emancipated until November, if she lived with you more than half the year (including time away at school), for tax year 2018 you would still be considered the custodial parent by the IRS. Therefore per IRS rules you would have the right to claim her as a dependent, assuming she otherwise meets the qualifications to be claimed. If you wanted to relinquish that right to her father (either voluntarily or because of a court order), you could do so by filling out IRS Form 8332 and giving it to him to file with his own tax return.
https://www.irs.gov/pub/irs-pdf/f8332.pdf
Since she is now emancipated, for tax year 2019 neither parent would be considered custodial.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
