SSS MATERNITY NOTIFICATION (employed)

Hello po! Im already 26 weeks pregnant and ngayon lang po na send ng HR manager namin yung maternity notification sa SSS thru online. Around March or April ko pa po sha sinabihan that I am pregnant pero nababaliwala nya pag send kasi lage daw sha busy. ? Concern po ako if may deadline ba yung pag notify sa SSS? Date of conception ko po is January Due date is this October.