Your employees already have deductions set up for their regular paychecks. They may also want some or all of those deductions applied to bonus checks, so as to accrue deductions on all the money they earn from you.
When you create bonus checks, we give you the option of applying some or all of an employee's deductions to the checks.
You can't use net-to-gross bonus calculation together with any deductions — retirement, HSA, or garnishments.