The flyer says the kindergarten registration starts 4.25 and so does the website. However, there are only options for the current school year.
The PowerSchool Community is a great resource if you have any changes to be made while completing fields within the enrollment form. Each district, however, has a different registration process and can provide the best steps to move forward when enrolling students.
If you are unable to choose any other school, you would need to reach out to your school district to inquire about the instructions to select the preferred school and proceed with the registration.
You can check out the FAQs related to the enrollment process here.