When will the nta will release the final key after all corrections made in challenged questions.

Dear Subhash,
The corrections are yet to be done by NTA (if applicable)on the official site and revised answer key will be corrected if found incorrect and the same will be notified to the aspirant soon which may take several days.The exact date or time is not published.
You may keep in touch with the official site of NTA.
Hope this is helpful to you.