My daughter turned 18 in july and just got her 1st job now in October. Can I still claim her on 2019 taxes?

[xmasbaby0]

Yes.  You can still claim your child until the year she turns 19  (or until the year she turns 24 if she is a full-time student) as long as she meets the other criteria for being claimed.  She can file her own 2019 tax return in 2020 to seek a refund of tax withheld.  But she must say on her own return that she can be claimed as a dependent on someone else's return.  You do not enter her income on your own return.

WHO CAN I CLAIM AS A DEPENDENT?

You can claim a child, relative, friend, fiance (etc.) as a dependent on your 2018 taxes as long as they meet the following requirements:

Qualifying child

• They are related to you.

• They cannot be claimed as a dependent by someone else.

• They are a U.S. citizen, resident alien, national, or a Canadian or   Mexican resident.

• They are not filing a joint return with their spouse.

• They are under the age of 19 (or 24 for full-time students).

• No age limit for permanently and totally disabled children

  •      They live with you for more than half the year (exceptions apply).

Qualifying relative

• They don't have to be related to you (despite the name).

• They cannot be claimed as a dependent by someone else.

• They are a U.S. citizen, resident alien, national, or a Canadian or Mexican resident.

• They are not filing a joint return with their spouse.

• They lived with you the entire year.

• They made less than $4,150 in 2018   ($4200 in 2019)

• You provided more than half of their financial support. More info

When you add someone as a dependent, we'll ask a series of questions to make sure you can claim them.

Related Information:

• Does a dependent have to live with me?

• What does "financially support another person" mean?

• Can I claim a newborn baby?

[Hal_Al]

Maybe.

There are two types of dependents, "Qualifying Children"(QC) and standard ("Qualifying Relative" in IRS parlance even though they don't have to actually be related). There is no income limit for a QC but there is an age limit, a relationship test, student status,  and residence test. See the other reply for full rules.

If she has turned 19, she can only be a QC if she was a full time student for parts of 5 months.  If she was not a FT student , then she must have less than $4200 of income to qualify as a dependent under the qualifying relative rules.  But if she is still 18, at the end of 2019, she can be a QC whether she is a student or not, as long as she lived with you most of the year.

Only a QC qualifies a taxpayer for the Earned Income Credit. 

[xmasbaby0]

@carnahanm1978 Did your child turn 18 in 2019?