How to enter revenue against a project and report it

How to enter revenue against a project and report it

I am using Time Tracking and projects to track revenue and expenses against specific projects.  I've created the project and customized the various templates to include projects as a required field.  I've entered and processed invoices as well as expenses.  However, when I run a P&L project for this report (customized report), it only shows the expenses, and not the revenue.  The revenue does show up on in the project summary report, but not in the P&L.  I need to report the project profitability in the P&L format.