This tab is available only if the Enable Loans to Employees option is selected on the Administration > Settings > HR And Payroll form.
The tab provides information only on those loans borrowed by the employee that have non-zero interest and are paid monthly.
The interest amount to be paid for the last month of work is calculated when you click Calculate on the toolbar. The amount appears as a deduction on the Accruals and Deductions tab along with the remaining unpaid amount of loan. 
The "Employment Termination (create)" form. The Loans tab
The Loan Document column shows the actual loans registered for the employee.
The Percentage Payment Amount column shows for each loan the amount of interest for the last month which is calculated as follows: Loan_Amount *P(%)/(100*12).
The Income Item column shows the income items specified for each of the loans with interest.
The Business Activity column presents the business activities to which the employees are related or with which loans are associated.