Hi,
You can apply for Condonation of delay u/s 119 (2) (b) and claim the Refund.
The application has to be presented to your Jurisdictional Commissioner of Income Tax (CIT). Request you to approach a local CA in this regard as this will require representation before the CIT to get the permission for filing belated returns.
Once the permission is granted by the CIT, then the Return can be filed online using the Option "Condonation of delay u/s 119(2)(b)" while preparing the Return