How are the date values in the Final Freight Statement populated?

When a new Final Freight Statement is created, the fields for Invoice Date and Due Date are defaulted to the day the Final Freight Statement was created and the 15th day afterward, respectively. You are able to change the value of either to any date you would like.

In the screenshot above, Invoice Date defaults to the day it was created (02/11/21), and Due Date defaults to the 15th day afterward (02/26/21).