Hello!!

You have not mentioned the of exam for which you want the details of test series.but NTA has released it's free mock test for jee mains about which you can get all information on our page-

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-mock-test/amp

And if you were asking about NEET then you can check previous year mock test papers on the site of NTA that will help you a lot.

Thanks