You may try using this IRS tool to help you determine if you can claim your daughter as a dependent:
https://www.irs.gov/help/ita/whom-may-i-claim-as-a-dependent
When it comes to your taxes, if you did qualify for certain tax credits in the past (child tax credit, earned income credit, education credit), based on having a dependent on your return OR if your filing status changes based on the fact that let's say you can't claim your daughter as a dependent, than yes, this might affect your taxes.
