Hi oceanbluebuildin,
Thank you for reaching out. In order to amend a payslip you will need to unlock and edit the Pay Run itself. However, if you've lodged STP I would recommend creating an ad hoc pay run to make your corrections and publish an additional pay slip.
If you decide to edit the existing pay run you can unlock it from Pay Run Actions, Adjust the Leave and then enter the standard earnings.
Once you have finalised the corrected Pay Run you will be able to then Publish new Pay Slips.
Please let me know if you have any other questions.
Thanks,
Rebecca