国内申請用のフォームの中に、「Additioanl Family Information」という用紙がありますが、その中に、私の名前、スポンサー、両親、子供、兄弟の書く欄がありますが、これは要は私の家族構成を書けばいいのですか？

I think that you can write like this.
Section A:
Applicant= your name
Spouse= your sponsor’s name
Mother&Father= your side
Section B:
If you have a child.
Section C:
brother, sister= your family side

Dose it make sence to you?
　

I think that you can write like this.
Section A:
Applicant= your name
Spouse= your sponsor’s name
Mother&Father= your side
Section B:
If you have a child.
Section C:
brother, sister= your family side

Dose it make sense?