@fusilli45
she was a full time student which is defined as ANY 5 months of 2022. it's not a "point in time" (dec 31) determination
also, as she is your dependent, her college expenses (that 1098-T) can create a tax benefit in 2022 for you.
this is the official IRS tool to determine who is a dependent: it'll take less than 5 minutes to complete. While the real issue is whether she paid more than 50% of her living expenses, that is unlikely since she presumably paid none the 1st 5 months of the year so it'll be hard for the math to exceed 50%
https://www.irs.gov/help/ita/whom-may-i-claim-as-a-dependent
in 2023, even if she is still living with you (and no longer a student), once she makes $4300, she is NOT your dependent
