OTL Contractor Reconciliation with AP/PO

Here is my issue.  When a contractor's PO is created for a Project/Task, then the contractor works and tracks time in multiple projects/tasks, how do I get the information in OTL to reconcile or update the invoice and PO based on the time tracked in OTL?  Is it possible to send updates that way instead of manually updating the PO/Invoice based on time worked and processed in OTL?  Any thoughts would be beneficial.

Thanks in advance!