Dear Ashok Kumar,
To add a new Designation, go to Employee module > Employee Settings > Designation tab.
To add a new Department, go to Employer module > Department
Alternatively, you can import Employee Data from an Excel sheet, which will automatically add new Designations and new Departments included in the sheet. Refer video in the link below on How to import employee data to Lenvica HRMS
https://www.lenvica.com/import-employees-attendhrm-file-excel/
Regards,
Sujit M