Deductions & credits

this forum can not see your tax info or return. if 3156 is earned income and your entire income then you have no income tax liability so the regular child tax credit, limited to your income tax, is zero

if 3156 is earned income then you should  get an additional child tax credit of 15% of your earned income in excess of 2500 [(3156-2500) x .15] =98

 

to check use the IRS EIC calculator

https://www.irs.gov/credits-deductions/individuals/earned-income-tax-credit/use-the-eitc-assistant