Bihar Board 12th Supplementary Form 2023: The Bihar School Examination Board (BSEB) will end the registrations for the Bihar Board 12th Supplementary Exam 2023 tomorrow, i.e., March 30, 2023, on its official website. Students who did not secure the minimum passing marks in the Bihar Board 12th result can apply for a supplementary exam on the official website of the BSEB, biharboardonline.bihar.gov.in.