Ay, this is frustrating talaga, a few of us nag-struggle din with the SSS online updates, especially pag grayed out yung fields! The email thing might be locked because it's tied to your account verification, kaya I'd suggest go directly to your nearest SSS branch with your ID at documents para ma-update nila properly and ma-file na rin ang maternity benefit mo mismo, mas mabilis at sure na walang system issues. Congrats sa baby mo, by the way! For the maternity benefit amount, it depends on your contribution history and salary bracket, but ask the SSS staff directly pag nandoon na kayo since they can calculate exactly kung magkano ang ma-claim mo based sa April delivery mo.