First, make sure the employee is paid holiday pay using the As Per Act method - 6% of Gross is not appropriate for salaried staff.

When your employee takes a holiday, go to Calculate Pays then click Holiday Pay. Now click Current Employee. The holiday payments screen appears - the only field you need to enter information is the Days Taken field. Click that field and type in how many days they are taking.

This will "pay" the employee the days, and take those days off their total owing. However, as long as you only entered the days taken, and did not enter a daily rate, no additional dollars will be paid to the employee. Their salary will be paid as usual, at the normal rate, and their payslip will show the number of holiday days taken.