There isn’t a way to delete a pay event if it’s already lodge to ATO, Tammy.
It’s commonly recommended to do the corrections in the upcoming or future pay events. You might also want to run the ad-hoc pay run.This is to account the differences between what was reported and what actually occurred.
Please check this out for additional details: Ad hoc pay run.
Lastly, you can always reach out to ATO for more guidance: https://www.ato.gov.au/About-ATO/Contact-us/
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