In order to add admin user in Modern Bill [MB] one need to perform below mentioned steps:
1) Login into Modern Bill as Admin.
2) Click on Tools -> System Config from top menu.
3) Click on System Settings -> Admin Config.
4) Click on New Admin.
5) Enter all require details:
- - Real Name
- - Username
- - New Password
- - Verify Password
- - Current logged in Admin password
- - Access Permissions Level [9 to 5 - Root user to Support user]