Field help (MACCNONREI) 

This field is used to specify whether the employee is resident or non-resident. It is useful for the generation of SCT payments. This parameter is defaulted to the value 'No'.

 SEEINFO The "resident" term means:

The "non-resident" term refers to the other legal and physical persons, including those of French nationality (with the exception of civil officials), who acquire the quality of non-resident the moment they settle abroad.