Depends on how old she is and if she earned income in 2023. If you provided support, enter her information and TurboTax will let you know if she qualifies as your dependent.
The rules can be found in this FAQ. There are 2 types of dependents; with the first, age matters, with the second, income matters.
Qualifying child:
- They're related to you.
- They aren't claimed as a dependent by someone else.
- They're a US citizen, resident alien, national, or a Canadian or Mexican resident.
- They aren’t filing a joint return with their spouse.
- They're under the age of 19 (or 24 for full-time students).
- There's no age limit for permanently and totally disabled children.
- They lived with you for more than half the year (exceptions apply).
- They didn't provide more than half of their own support for the year.
Qualifying relative:
- They don't have to be related to you (despite the name).
- They aren't claimed as a dependent by someone else.
- They're a US citizen, resident alien, national, or a Canadian or Mexican resident.
- They aren’t filing a joint return with their spouse.
- They lived with you the entire year (exceptions apply).
- They made less than $4,700 in 2023.
- You provided more than half of their financial support.