Https://incometaxindiaefiling.gov.in/ is not working

hope so  

Actually it is working . Your Internet speed may be slow. Those having dongle service may be having some problems. With fast blazing speed it takes three min to open the site. From 6 Pm to 12 Pm you cannot E-verify  your retrun. IT web site says.

try to connect and file today.  But if you feel confident of your return that there are no changes then you can file later also.