Yes, you would qualify as Head of Household.
Check your entries in the MY INFO section. There is a question asking whether you provided over 50% of household support.
Since your daughter is too old to qualify as a Qualifying Child (under 24 if a full-time student or disabled), that may be where you are having an issue with two different answers.
She would be an Other Dependent.
Here's more info on Head of Household and Other Dependent.
[Edited 03/17/2020 | 2:56 PM]
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