thank you for your answer i sent the same question to KCC and this is their answer would you please explaine more for me
The principal applicant and all family members from the original entry must complete the form DS-260 and participate in the interview. If your qualified unmarried child will immigrate at a later date and travel separately from you, they are not required to participate in your interview. They will be scheduled for a separate interview appointment. You should contact the U.S. Embassy or Consulate directly to arrange separate interviews, if needed. All of your children must be listed on your DS-260 as well.
A passport is required for visa processing, and is therefore required when completing the DS-260. If you update or renew your passport in the future, you can unlock your DS-260 to update the new information. Further details about what this means are available on