Go back and check all of your entries for your dependents. A child age 6 thru age 17 is eligible for a $3,000 child tax credit in 2021. Especially check their dates of birth, how long they lived in your home (Whole Year) and that they did NOT provide over one-half of their own support.
What you have reported is having a dependent who is age 18 or older who would only be eligible for the Other Dependent credit of $500.
Thanks for your response.
As my research, it is due to that my children do not have SSN. They have only ITIN. BTW, why the credit for other dependents is only 500$ though I have two kids. I think it has to be 1000$.
Thanks.