I need to add a child that just received his SS card. I am filling out a 1040x, but im not sure of the steps to add one child.

Do i fill out a new EIC schedule 1040 adding the qualifying child to the original and attach it to the 1040x?

Do i just add him to dependents and put in the dollar amount for the total eic or total minus what was already received?

How do i determine the exact dollar amount of eic to put on the form as they seem to ask for that.

Any clarification would be appreciated.

thank you