This option, available from the Options menu in the Nature 10/20 screen, allows the mass update, or mass removal, of the Refund Reason Code against Entry Lines
Enter the RRC code or use 
to search for the correct RRC code.
Select 
to add the RRC code to all the Entry lines. This will also replace any RRC codes that already exist against any Entry Lines.
Use 
to clear all Entry Lines of any RRC codes.