DS-260, Immigrant Visa and Alien Registration Application
Here you can preview a sample of DS-260 form before beginning.
The file is in .pdf format (6.4MB):
If you want to start completing the official DS-260 Immigrant Visa and Alien Registration Application, you can access this webpage online: Consular Electronic Application Center (CEAC)
For accessing and updating the data about yourself and your family that you presented in your DV entry you will have to insert your DV case number in the online DS-260 form.
The main applicant and each member of the family who intends to submit an application for a diversity visa and travel to the Unites States should fill electronically the DS-260.