Business & farm

we've never filled out an 8332 before, and we've each claimed the child outlined in the agreement, each claimed HOH, I assume each received the child tax credit, and previously (before either child was 13 y.o.) submitted the summer camp expenses as child care expenses and received credit for it.  I guess I don't understand if an 8332 is REQUIRED, or just suggested since we've never done one, and haven't had any issues.