This is nothing to worry about. It is normal for clients who lodge multiple prior year returns at the same time to have them processed at different times.
This is due to the way the ATO processes returns. The ATO may process your returns as one batch, multiple batches or separately. Processing usually occurs in chronological order however this is not always the case.
Furthermore the typical ATO processing times do not apply to prior year returns as some information provided in your tax return is carried forward into future returns. This means you may experience significant additional processing times depending on how many overdue returns were lodged.
Failure to lodge your income tax returns on-time is a crime and punishable by fine or imprisonment. We offer clients who have lodged multiple overdue returns and are unhappy with the length of time the ATO is taking to process their returns the following advice, don’t poke the angry bear.