My dependent who is a student and just got a job a few months ago, filed taxes this year. Can she still be claimed for the months before she began working?

[DanaB27]

Yes, if she meets the requirements to be your qualifying child or qualifying relative then you can claim her as dependent for 2021:

Qualifying child

• She is under the age of 19 (or 24 for full-time students).
  • No age limit for permanently and totally disabled children.
• She lived with you for more than half the year (exceptions apply).
• She didn't provide more than half of her own support for the year.

Qualifying relative

• She lived with you the entire year (exceptions apply).
• She made less than $4,300 in 2021.
• You provided more than half of her financial support.