After you have created the group, you can then proceed to the assignment of the staff to the respective group. The group administrators can then assist with the employees with attendance related issues as well as to approve timesheets for those who are reporting to this group.
The Group Assignment is the place where you decide which group each user should in placed in.
Step 1: Click on the 
at Attendance
Step 2: Click on 
Step 3: Click on 
. The system will show the entire list of employees
Step 4: At the Group column, select the group the staff should be in.
First Step see also https://support.justlogin.com/hc/en-us/articles/360025232852-Configuration-Group-Setup-Express-