I graduated from school in the U.S., obtained my RN license, and am currently working at a hospital.
I understand that nurses are exempt from the visa screen requirement when applying for a green card.
I’d like to know what documentation I need to show, when filing I-140, to prove that this visa screen exemption applies.
I believe you’re referring to the English test score exemption needed for the visa screen certificate. You can find detailed information about the visa screen exemption provisions at http://www.cgfns.org.