Open: Project Accounting > Utilities > System Setup > Project Accounting Settings | Postings.
Select from the following settings.
You can post transactions in your project that are not connected to a supplier or customer. These are recorded in the Nominal Ledger.
You can choose whether these are posted as costs or revenues.
Select the As Cost or As Revenue options for Taxable Payments and Taxable Receipts to set the default for these transactions.
You can choose where the nominal accounts originate when entering project analysis on standard items which belong to a product group with Product type of Stock,on sales order lines and returns.
You can choose different origins for costs and revenues: