To export a pay run to QuickBooks Desktop, go to the "Settings Menu" and click "Payroll Integrations", and then click "Pay Run Exports."
Next, select the export arrow next to the check date to save the file on your computer.
After you save the file, open QuickBooks and select File > Utilities > Import > IIF Files... Then locate the file and click open. QuickBooks will prompt you that the data has been imported.