Why can't I change my bio on the xbox 360?

Go to the Xbox website and sign in. Then go to profile settings. Next, at the bottom it will say bio so type what you want then click to save. If your parents set up your Xbox they might have turned on parent settings so that you can't have a bio. If that happens go to your friends house who has a Xbox 360 recover your gtag and then sign in to your account and go to cancel setting. It will say change name, profile, pic and then bio. Change your bio to whatever then go on your laptop. It will ask you under change gamer pic to change bio. I know that's a lot but it is worth it to get a cool bio.

If you parents set the controls so you couldn't set up a bio, then it was for a good reason. You should get your parents' permission before changing the bio if the control was set.