Hi,

the dummy registration card of 12th class bihar board is releaser on 28th july and the last date to download the dummy registration card is 5th august so follow the instructions as give below

login in into the official site www.biharboardonline.bihar.gov.in

fill the otp and dummy registration card appears and download it.

for more details please check the below link

https://school.careers360.com/articles/bihar-board-12th-admit-card

All the best!