I600 Help

Hello, We are using a facilitator for our international adoption and need some help with filing the I600. We have already filed the I600A and received the 171H approval. We have now identified a child and need to send in the I600. My question is this: On the instructions it says that you need to send a home study. If we already sent our home study with the I600A, do we have to send it again? What else? Thanks! Zaiby