If you cannot use the entire amount of your child tax credit on line 53 of For 1040 because it is more than your tax, you may be able to claim the unused amount of the child tax credit as an additional child tax credit on line 68.
Additional_Child_Tax_Credit.html
You may be eligible for tow new credits below for making energy saving improvements to your home in the tax year.
Residential_Energy_Credits.html