Hello Mannan Abdullah,

Check out this link,

https://ntaneet.nic.in/Ntaneet/Welcome.aspx

This is the valid official website that you were looking for.

BEST WISHES!

Hello, as per your confusion rearding site of nta neet, then dont worry about this problem as the site might be down basically, due to some techincal or cyber problem. Basically it happens due to network issue from the candidate location . 

Try after some time of after a day, it will surely open as this sort of problem solve faster. 

Good luck