If you fail to receive the EVC on your mobile device, the first step should be to verify the accuracy of your mobile number in both your Digitised Account and the e-filing portal. If the number is correct and you still haven't received the EVC, you can regenerate it through the e-filing portal. This process is simple: log in to your account, select the return you want to e-verify and request EVC generation again. If issues persist, consider contacting your Digitised service provider or seeking assistance from the IT Department's helpline.