Hey there
The link mentioned below provides you with all the papers of National Institute of Open schooling so kindly go through the link and get your papers for different years of 2021, 2020 2019 2018. You need to just scroll down and click on the links for getting papers.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://school.careers360.com/articles/nios-question-papers/amp&ved=2ahUKEwiwyNGr7vTzAhV4zjgGHe22DjAQFnoECAkQAQ&usg=AOvVaw3csP-k9L1_rYgnWwarBAyA&cf=1
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