Hello Jai,
If i understood you right, then you are looking for notification in the workbox.
I assume you have a business scenario created with proper data and you have subscribed to one of the KPIs to receive notifications (tasks) in the workbox when it is breached or about to be breached.
Can you confirm if you have scheduled the notification job as mentioned in the installation guide of OPInt? Chapter 5.2.2 in http://help.sap.com/saphelp_hana_opint/SAP_OPInt_Installation_Upgrade.pdf
Regards,
Sesh