Hi, could I ask anyone how to submit the DS-260? because there is an invoice id number required before you can open the form. I submitted I-130 and be approved to make an interview appointment now, but there is no information about that invoice id number anywhere. So even I made an appointment this month, I still don't know how to open the DS-260, not mention fill and submit it! And there is no require from embassy to ask me to submit one neither. Could anyone know what's this situation? Does that means I don't have to submit a DS-260 because I have already been approved through I-130?