Hello dear

You should refer to the official website of JoSAA for any of these kinds of documents. There they provide proper links for all the subtopics. Use the following link of official website- https://josaa.nic.in/webinfocms/Public/home.aspx

Also, I am providing the direct link of the website which contains the details regarding opening and closing ranks for round 1 for this year- https://josaa.nic.in/Result/result/OpeningClosingRank.aspx

I hope this helps. Feel free to ask any other queries.