Hi FMJ76,

You're on the right path when trying to adjust the super on the employee's pay run. If super payments have been made on the pay run you're unable to edit and unlock the pay run affected. You'll have to create an Adhoc pay run and still add the earnings to be able to adjust the super amount. Here's how to unlock the pay run:

1. Click on the Employees tab.
2. Click on Pay Runs, and select the pay run affected.
3. Click on pay Run Actions, and click on Unlock.
4. Enter a reason, and click on Unlock.
5. Make the adjustments by clicking on Actions, and clicking on Adjust super.

To create an Adhoc pay run:

1. Click on the new pay run, and use the same pay period and pay date of the affected pay run needing adjustments.
2. Click on the employee's name to open up the earnings line,
3. Select the Actions button and select Adjust super.
4. Enter the amount in the negative figure.
5. Repeat the process for other employees.

Once done, you can create and submit an updated pay event to the ATO.  You can also check this link to learn more about How to create an ad hoc or off-cycle pay run.

If the issue remains, I'd also recommend contacting our Customer Care Team. That way, one of our support agents can further check your payroll account in a secure form.