How do I amend a tax return?
Find out how the ATO says individuals can fix a mistake or add missing information after lodging a tax return.
Summary
If you make a mistake in a tax return or need to add missing information, the ATO explains that you can request an amendment. Amendments can generally be requested online, by paper, through a registered tax agent, or by contacting the ATO in some cases.
What this means
An amendment is used to correct information after a tax return has already been lodged and processed.
Common reasons include missing income, forgotten deductions, incorrect details, or changes to information received after lodgment.
Typical actions
- Wait until the original notice of assessment is issued before amending in most cases.
- Identify the mistake or missing information clearly.
- Use ATO online services, a registered tax agent, or the relevant paper form to request an amendment.
- Keep records supporting the change.
Official ATO sources
Last checked: 20 June 2026
Amend your tax return
Explains how to correct or fix a tax return.
How to request an amendment to your tax return
Explains ways to request an amendment.
Before you amend your tax return
Explains things to check before requesting an amendment.
Related questions
- Do I need to lodge a tax return?
- What income do I need to declare?
- What records should individuals keep for tax?
- Can I claim work-related deductions?
Important notice: Tax Clarity is an independent information tool. This page provides general information based on official sources. It does not provide tax, legal, financial, or accounting advice. Tax rules can change, and how they apply depends on your circumstances. For advice about your situation, speak with a registered tax agent or qualified professional.
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