Is this page for you?
Plainly: this is a lower-fit form for reuse. Schedule 8812 has one name line and one social security number. The rest is a worksheet of counts, Yes/No answers and amounts that you work out again each tax year, and RepeatForm never does that for you. So the benefit is small: your name and number carried across, and a Review step that shows you everything else that needs to be entered by hand. If you only want the name line done, that may be all you need.