If you haven't lodged this pay run to the ATO yet, you can Unlock the pay run, which reverses the journal. Then, make your necessary adjustments and re-finalise the pay run.
However if you have lodged the pay run to the ATO already, you will have to create an ad-hoc pay run and lodge that to the ATO to adjust the YTD figures, or alternatively make the adjustment in the next pay run.
Yes, it was in January so it has been lodged with the ATO, and the SGC paid into the super fund.
After I sent the message I thought of using a special payrun, as you suggested, and making the hours negative. That worked OK and has calculated the correct negative Gross and Net earnings, but the SGC is zero. I don't need to worry about PAYG because the original gross was below the threshold and the tax was zero.
Can you confirm that this is the correct approach before I finalise the payrun? How can I reverse the SGC that was in the original payrun (and has been paid into super? The amount of super they will earn in this month will be more than that so deducting it in this month's distribution is OK.
Yes, running an ad-hoc pay event will adjust the figures to the right amount. In regards to SGC, it depends on if the adjustment results in you needing to pay more super or needing to pay less.
In the case that the ad-hoc pay run includes a negative adjustment to SGC, include the ad-hoc pay run's dates to the next super batch to ensure the adjustment is calculated.
If the ad-hoc pay run includes a positive adjustment to SGC, create a super batch with the same dates as the last Quarterly super batch you have created (and paid out) so that the outstanding super payment amount is accounted for.