As per exchange norms your account gets restricted for trades if you have not transacted for more than 24 months.
Through Mobile App (IIFL Market App)-
- Login to IIFL Market app
- Click on Hamburger Menu
- Click on Client code
- Click on View/edit detail
- Click on personal detail
- Fill all missing details
- Submit the FATCA declaration
OR
Through IIFL Markets Web Portal -