Hi,

You have to use some third-party module or some custom codes for the use case. The deduction can be done using the salary structure of the employee.

For the settlements, you can check out our module available in the store: Open HRMS Gratuity Settlement

The employee resigning process in the Odoo is to change the status of the employee contract.F or more you can check out the module build to handle employee resignation: Open HRMS Resignation

Thanks