I received a letter from the IRS that I still owed more money based on the child tax credit checks. I do still owe that money, but as I looked at my filing status, I realized I had forgotten to claim my childcare costs for the year. I would like to amend my return to include those deductions, and send the remainder in. What is the easiest way? I have a Notice CP11 to include with my payment, but can I also include an adjusted SChedule 8812 to show the deductions I did not claim?