Thank you for reaching out to the Community for assistance!
Any changes to the submitted form can only be made by the school/ district. You will need to contact the school or district directly to inform them of the needed changes.
If the form has not been submitted, you should be able to make any necessary changes yourself by access the form using your Parent Portal. You can refer to this article for more details.
You can also check out the FAQs related to the enrollment process here.