System should have ability to deduct from employee’s salary based on pre-defined rules

Summary

For external classroom trainings, system should have ability to deduct from employee’s salary based on pre-defined rules, if enrollment cancellation is done less N days of training due date

Content

For external classroom trainings, system should have ability to deduct from employee’s salary based on pre-defined rules, if enrollment cancellation is done less N days of training due date. Also Is it possible to link payroll calculation based on the training attendance?