Hi @Neeharika
Thank you for reaching out for assistance. The PowerSchool Community is a great resource if you have any changes to be made while completing fields within the enrollment form.
PowerSchool, however, does not have access to any Parent Portal account information. The accounts are managed and handled at the school district's end and are stored on their servers. I recommend reaching out to the admin at your school district who can update the change of school on your account.
You can check out the FAQs related to the enrollment process here.