There has been no ruling regards the SEBC reservation yet. The Supreme Court mentioned that there will be no Maratha/SEBC reservation for jobs and admissions this year.  The provisional seat matrix available at https://view.mahacet.org/mahacet/admin/news_document/Provisional%20Seat%20Matrix%20for%20MBBS%20BDS%202020-21.pdf  doesn't have SEBC Category mentioned. The information Brochure available at https://view.mahacet.org/mahacet/admin/news_document/FinalNEETUG%202020%20Informationrochure04112020.pdf also doesnt mention SEBC reservation. This means it might not be implemented this Academic year.