psychonaut

Hi hope you are well. I am pre-sales and Using the demo system. I need to be able to sell a client an annual service , but the start date of the service is in the future, say next week. (So I can send client an invoice so they can pay me before I pay for and provision their licenses...for instance if I am taking over hosting from another provider). I can't see how to do this, it seems to only allow today to be the start date of the service. Please enlighten me as to how to do this.