What tax year are you referring to?
If you have earned income and a dependent child under the age of 17 you would be eligible for the Child Tax Credit. Providing you answered the questions concerning the dependent child correctly.
It would be included in any federal tax refund you received.
On a 2019 tax return the credit is entered on Form 1040 Line 13a.
On a 2020 tax return the credit is entered on Form 1040 Line 19
