Once the payroll is already processed, you'll want to delete and recreate the paycheck to correct the pay period. However, this is only applicable for manual paychecks. To do this, you can pull up the Paycheck List report to see the paycheck you created and delete it from there. Here's how:
Click Reports from the leftmenu.
Search for Paycheck List report.
Choose the date range.
Put a checkmark on the paychecks you need to delete, then select Delete.
Once done, you can now recreate the paychecks with the correct pay periods. Please be guided by the steps below.
Click Payroll from the left menu, then select Employees.
Select Run payroll and choose the employee.
Enter the necessary information.
Choose Preview payroll, then Submit payroll.
Hit Finish payroll.
However, if you processed your payroll via direct deposit, I suggest reaching out to our QuickBooks Support Team. This way, they can help delete or void the paycheck and correct the pay period.