Did they live with you for the WHOLE year in 2024? Did you pay for over half their support---food, shelter, clothing, medical expenses, school supplies, etc. etc. etc.?
You might be able to claim your GF and her children as "qualified relative" dependents and for each of them you get a $500 credit for other dependents. You do not get child tax credit or earned income credit for your GF's children.
If you are claiming a child of your own, you can use Head of Household filing status and claim your child for all of the child-related credits for which you qualify.
Qualifying relative
Did they live with you for the WHOLE year in 2024? Did you pay for over half their support---food, shelter, clothing, medical expenses, school supplies, etc. etc. etc.?
You might be able to claim your GF and her children as "qualified relative" dependents and for each of them you get a $500 credit for other dependents. You do not get child tax credit or earned income credit for your GF's children.
If you are claiming a child of your own, you can use Head of Household filing status and claim your child for all of the child-related credits for which you qualify.
Qualifying relative