You can view the e-filed certificates under Reports section in the tasking zone.Go to Reports and click on E-Filing Status and Certificates. Now click on the appropriate E-Filed return link to view the reports or certificates. You can also print the certificate for your reference.

Road Map - To Find out the E-Filing Certificates
Reports -> E-filing Status and Certificates
( 'Reports' is the button positioned in the tasking zone menu at the top. It is the second button from the right)