If you do not verify in time, your return is treated as not filed and it will attract all the consequences of not filing ITR under the Income Tax Act, 1961. However, you may request a condonation of delay in verification by giving an appropriate reason. Only after submission of such a request, you will be able to e-Verify your return. However, the return will be treated as valid only once the condonation request has been approved by the competent Income Tax Authority.