Hello aspirant,

In 2021 NATA exam has conducted 3 times and  3rd attempt registration had been closed on 22 Aug 2021.

For 3rd Attempt

NATA 2021 application form release date- July 26, 2021

NATA admission form closed- 22 Aug 2021

NATA exam date 2021 (third attempt)- September 3, 2021

For more information click below link

https://engineering.careers360.com/articles/nata-application-form

Hope this helps you