***We do not recommend editing withholdings or deductions during a payroll run. The best practice is to edit a withholding or deduction at the Employee Profile level and then run payroll.
However, many payroll professionals record after the fact payroll in which case it is necessary to edit withholdings in order to match past payroll data.
Select Off Cycle Payroll from the Payroll page
Edit Withholdings or Deductions on step 3 of the Off Cycle Payroll Run