some told me that it have to be an reason to be home schooled is that true
No, but usually there is.. whether your parents choose to, you're having trouble in school, have lots of siblings, or you just randomly want to be homeschooled, these are all reasons.
Ooooh...wait! can I change my answer?
Well what I meant to say is.. 'yes' instead of, 'no,but usually there is'
No. You do not have to present a reason to anyone. You do have to be certified with a state agency to homeschool.
Nope, it's not. You just have to have parent concent, unless you're 18+ :]