on import (excel file)

on import (excel file)

Hello, I have three fields in a form I created (serial number, module type, is used(checkbox yes)

On the import the user will select from the excel file just the serial number. I want the checkbox to be automatically set to false ( I imagine since it is not considered checked it is false, but I think it is actually Null instead) and I want the module type to be 0. 

Is there a way on import on each field imported the two other fields get their default values? 

Thank you.