How do i send my Rsvp's now, and then send a menu and get responses at a later date?

Hi there

I am getting married in a year but want to send my RSVP's now as the wedding is abroad.

However, I can't see a way of sending RSVP's now, and sending a menu for people to choose from in lets say 8/9 months and still have it linked to the guest list?

I'm not sure has anyone had this?

Thanks in advance

Meabh