Hello Tanay !

NIOS exams for Block 1 have been started from March 16 ,2020  and are open till  July 31, 2020.

With late fee , the dates are August 1-15, 2020.

NIOS exams for Block 2 will be start from September 16, 2020 and will end on  January 31, 2021.

You can check more information on our site by the following link :

https://school.careers360.com/articles/nios-admission

Hope it helps !