How to transfer margins arising from intercompany project billing to receiver project

Summary:

We are implementing project intercompany billing where provider resources are managed by the receiver and hence the provider costs are charged directly to the receiver project. We also operate a 20% transfer price between provider and receiver and as such the provider gets a 20% profit, accounted in revenue and invoices for costs charged by to the receiver project by prover resources (labour and facilities).

Having run through the intercompany billing process, I noticed the payable invoice created in the receiver BU is only transferring non recoverable taxes. As a result there is a difference in projects subledger and GL as receiver project is now short of 20% margin that should've been charged to the receiver project.