<p>For the section that asks about your siblings is it any you have? What if they don't live with you?
Will this affect my application? Also if they are in high school do I select "some high/secondary school" as their education level?</p>
Your siblings are your siblings, whether they live with you or not. Also, there is a spot for their age. If they are 15 or so, it makes sense that they’re in high school and you would choose some high/secondary school.