Hi Kevin,

Thanks for posting the Community!

When the pay run is unlocked, it will promptly reverse the payroll journals exported to QuickBooks Online. After correcting the pay run, rest assured that no duplicate payroll journal records will exist, as the original journal will have been reversed.

Check this link for reference about: Unlock or delete a pay run in QuickBooks Online Payroll.

Feel free to drop a comment below if you have any other questions. I'll be around to help.