The expenditure section in TM3 records all out goings within the system.
You can find the 'Expenditure' section within the 'Finance' area of TM3.
When you enter this section it shows the screen below. It is broken up into 7 columns.
At the end of the record there is an 'Edit' button which you can click on to make any changes.
These sections are populated when creating an expenditure.