Please check there website - 

https://learning.tcsionhub.in/EForms/configuredHtml/1016/2151/login.html?instanceId=1#1@IID@Home/Catalogue=redirectTo~@~&subAction=viewMicrosite&Link=https://cdn4.tcsion.com/dotcom/ICMP/layout/Microsite/betaForInsFour/nataDemo/nata_ins4.html&id=NATADEMO25122017&name=National+Aptitude+Test+in+Architecture+(NATA)-2018

or

https://engineering.careers360.com/articles/nata-counselling

for details