Percent Complete Revenue Method - Auto Calculate

Summary:

We want to use the Percent complete method to automatically generate percent complete revenue based on the project actuals and forecasted EAC amount. When we generate revenue using the percent complete revenue method it requires us to enter the percentage or amount vs automatically calculating it.

It will be helpful if anyone knows the steps to get the percent complete revenue method to calculate the revenue based on progress vs having to enter the percentage or amount manually. Where do I tell the system to do this?

Do I need to create a different billing extension than the seeded one for percent complete revenue?