The first link below outlines what is needed to prove EIC. The other two may also be helpful to you.
https://elite8financial.com/wp-content/uploads/2017/01/f886-h-eic.pdf
https://www.eitc.irs.gov/eitc/files/downloads/f886-h-hoh.pdf
https://www.eitc.irs.gov/eitc/files/downloads/f886-h-dep.pdf
