Missed the 31 October 2026 tax return deadline? Late lodgement penalties, interest, when to pay, tax agent due dates, and what to do now.
Deadlines & Late Returns
Key ATO due dates, penalties for lodging late, and how to catch up on overdue returns.
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Read more: Missed the 31 October Tax Deadline? What Happens Now and What to Do
How to complete and lodge your 2025–26 tax return: key dates, what to gather, lodging through myTax or a tax agent, and the deductions people often miss.
Facing a late tax return for businesses in 2026? Our guide walks you through ATO penalties, the lodgement process, and how to minimise financial damage.
Behind on your tax return? How to lodge overdue returns in Australia, what the ATO can charge, and how a tax agent can catch up several years at once.
Self-lodgers must lodge 2025–26 returns by 31 October 2026 and generally pay by 21 November 2026. Plus BAS dates, Payday Super, agent dates, penalties, GIC.
How to lodge old tax returns: a clear, practical guide to finding your records, lodging with myTax and avoiding penalties.
Find out what Non-Lodgement Advice is and how it helps simplify your tax obligations with the Australian Taxation Office.
A practical guide to business activity statement lodgement in Australia. Learn how to prepare, lodge, and pay your BAS correctly to ensure ATO compliance.
Discover what happens if you don't lodge tax return. Learn about ATO penalties, hidden costs, and how to resolve overdue tax returns before it's too late.
How to lodge a company tax return in Australia: records to prepare, 2025–26 due dates, SBR software vs tax agent, company tax rates and Division 7A.
How Australian tax fines work and how minor oversights can lead to unexpected ATO penalties, plus how to avoid them.
Use this BAS preparation checklist to lodge accurately and on time. Learn key steps to reconcile accounts, avoid errors & stay ATO compliant.
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