Satyaveer, National Institute of Open Schooling will release the hall ticket or admit card tentatively in the first week of March and so the admit card may be released any time soon on the official website nios.ac.in

The candidates can download their NIOS admit cards by entering the enrollment number known to them. Also as you may be knowing that there are different admit cards for practical and theory exams and so you need to download both the admit cards to appear for the exams.

Now, over to the second part of your query, the English exam for class 12th is on 7 April 2020 and the English exam for class 10th is on 3 April 2020.