To add internal expenses go to Expenses tab and click New+ and New expense pop-up window will appear. Or click New+ button in the Home tab, select Expense and New expense pop-up window will appear. Choose the type of an expense you want to add from a dropdown menu: Expense; Subcontract; Salary or Taxes. Add other necessary information.
This information will be seen only internally.
You can split expense on multiple projects. See Can I split and expense on multiple projects.
Last Update: January 22, 2018