If you want to assign subsidiaries codes in the same way as they are assigned in the employee management today on a previous month, go to Data Diagnostics - Tools - Period and degrees of occupation - Update subsidiaries - For a period

Select the period you want to modify :

It is possible to make another one without going out completely:

This utility can be used if, for example, the structure of the subsidiaries codes has been changed during the year or if you decide to use the concept of subsidiaries when the year is already underway.

The program stores the codes for each person every month, so putting information in the employee management today does not automatically affect the months already closed.

If nothing has been done so far, the easiest way is to assign the current codes to the past periods and modify them if necessary with the History of subsidiaries utility.