Cross connect Help Desk to Invoice / CRM

Cross connect Help Desk to Invoice / CRM

I'm trying to us Help Desk as my point of contact for IT helpdesk related tasks, and I'd like to be able to track customers and bill them based on the work I'm doing in HelpDesk. (i.e. I need to connect requesters to the CRM an bill those requestors)  Is this possible?  If so, how do I do it?

Rich