C A FINAL - CONVERSION FROM OLD COURSE TO NEW COURSE

I am a C.A Final student registered under old course. I am not appearing CA Final exams during this May June 2021 due to covid 19. I think this will be the last attempt for old course students. I have completed my articleship long time back. Now I am planning to convert myself into new course for Final exams to be held in November 2021.

How can I convert from C A Final Old Course to New course for Nov 2021 exams! Is it by default or I have to do something!