Regarding the timesheet submission - CG

I joined in CG 2nd may 2025.after that I faced some health issues in the month of August . I dedicated to resign . I inform the same to my People manage and HR. They asked to apply for LOP for 90days and serve the 3months notice period without salary. But I not did the same . I applied my timesheet in bench code. I resigned on Oct month, my lwd was 2nd Jan 2026. I am unable to submit my timesheet in bench code. I need the time helpdesk clearance. What can I do now?