Yes. E-verifying the ITR is a mandatory step in the filing of the ITR failing which the process is said to be incomplete. The Income Tax Department cannot process the returns till they are successfully e-verified. Hence, even if a taxpayer has filed their ITR before the due date but has missed e-verifying them before completion of 120 days from filing them, the return is not said to be filed on time as per section 139(1).