Open school board on demand exam

Online demand exam
Good evening, sir i want to ask about online examination, online demand draft, sir my request is that i want to ask about on demand exam form filling month on this year, sir i have appeared in the since year 2018 September exam on 10 class open school board. And i haven’t completely cleared the batch on September exam, and i have CTP on two subjects and the result i have, it saying 2020 September, sir i request you to clear this confusion to me. Can I appear on the 2020 exam by this year of month, or not?