the tax laws for the child credit and the additional child credit change completely for 2022.
the regular child tax credit is limited to your tax liability and excess is not refundable. with only $3,000 of income that would likely be zero. the additional child tax credit, refundable, in your situation, would be 15% of earned income (wages or net self-employment income) in excess of $2500. so it would seem at most you would get is $75 if the entire $3000 was earned income. look at form 8812
