The current government-required qualifying details must be entered for the deal in the Qualifying Details section, which is located in the Mortgage Request Details section. This section can be directly accessed by clicking Application Information > Mortgage Request Details in the Left Navigation Pane.
The values entered for qualifying details are used to calculate GDS and TDS ratios (seen at the top of the Expert screen). After values are entered, click the Recalculate button to display the Monthly Payment and update the GDS and TDS. You also have the option of displaying interest only by selecting the Interest Only checkbox.