How do I know that notice under e-Verification has been issued to me?
The Income Tax Department will send a notice u/s 133(6)​ of the Income Tax Act, 1961.

This will be visible on your e-filing portal account on incometax.gov.in. The notice is also emailed to the latest email address submitted to the Income Tax Department while filing the return of income. You will also receive SMS on the latest mobile number registered with your PAN.