If you have underpaid gross wages to an employee, you can create an
unscheduled payroll check
for the difference.
Alternatively, you can add the difference to the employee's next scheduled paycheck.
To do this task
Set up a payroll addition item called "Underpayment" with the tax tracking type "Compensation."
On your next scheduled payroll, create the scheduled paychecks, adding this new payroll item
to the underpaid employee's paycheck.
The additional payroll item increases the employee's taxable wages, and the employee's pay stub and your reports
reflect both the regular wages and the "catch-up" amount.