There is a business which regularly downloads employees' work hour data in IIF files from the time tracking system, and imports into QuickBooks.   The version of QuickBooks is Desktop version Enterprise 18.

What has been troublesome is that it seems QuickBooks can only identify employees by their names, and, thus, when there are employees with same names, the names had to be modified in some way to make them distinguishable such as by adding some special characters or numbers to the names. 

Having to use such naming convention led to frequent troubles for the person who handled the data.  If the employees could be identified simply by their employee numbers, such troubles could be avoided. 

So, here my question is whether there is a way to import employee time data into QuickBooks in which employees are identified by their employee numbers rather than their names.