Yes, just download VA Form 22-1995, fill it out, and send it in to the VA regional claims processing office that is in the same region as your school. I can give you a list of regional processing offices if you need it.
can someone help me so I don't make any mistakes?
If you need help you can work with a trained professional called an accredited representative to get help requesting a change to your benefits.  I can provide you with more information on  how to get help submitting your request
if I do it myself I just send it in to you guys?