Some districts provide direct links to access the registration forms while others use the PowerSchool Enrollment portal for the registration process. You can check out the school's website and access the correct form for 22-23 from its registration page, or, you can also access the form through your Parent Portal by referring to this article: Accessing the Form using PowerSchool Parent Portal. Please try clearing your browsing history, cache, and cookies, and switching to a different web browser or device if you face an error.
If you still fail to find the required form, it is possible that the form is either not yet published or temporarily disabled by the school district for maintenance or else is not accessible for registration currently. In that case, you would want to reach out to your school/district to inquire about the instructions on when and how to access the application form.
You can check out the FAQs related to the enrollment process here.