Use this when the dividend is from an Australian company/ETF and TFN withholding was applied.
Open the holding → Income → click ⋮ → edit the dividend/distribution.
Click Additional Fields.
Enter the amount in Resident/TFN Withholding (AUD) (positive number).
Keep Net Payment as the cash you actually received.
Update Dividend.
This keeps your cash correct and records the withheld amount for reporting.
Custom Investments
Same steps: Income → edit payment → Additional Fields → Resident/TFN Withholding (AUD).