How do I amend a previous year tax return in Australia?
You can amend a previous year's tax return in Australia, generally within two years for individuals, through myGov, tax software, or by mail. You'll need to explain the changes and provide supporting documents.
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How it works in practice
Amending Your Tax Return
If you discover an error or omission in a tax return you've already lodged, the Australian Taxation Office (ATO) allows you to amend it. This process ensures your tax obligations are accurate and you receive any correct refunds or pay any outstanding amounts. Most individuals have a two-year time limit to amend their tax returns, starting from the day after you received your original notice of assessment.
Methods of Amendment
You can typically amend your tax return through several convenient methods. The quickest and easiest way is often online via myGov, linked to the ATO. Alternatively, you can use registered tax agent software if you use a tax professional, or submit a paper amendment form by mail. Each method requires you to clearly state the changes and the reasons for them, ensuring the ATO has sufficient information to review your request.
Important exceptions
The standard two-year amendment time limit applies to most individuals and small businesses. However, this period can be longer for more complex tax affairs, such as large businesses or super funds, which may have up to four years. If the ATO initiates a review or audit, they might amend your return outside these timeframes. You cannot amend a return if you are under investigation for fraud or tax evasion, or if the original return was fraudulent.
What you should do now
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Identify the specific errors or omissions in your previously lodged tax return and gather all relevant new information or documents.
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Determine the best method for amendment (myGov for individuals, tax software for agents, or a paper form from the ATO website).
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Clearly state the income year you are amending, precisely what changes you are making, and provide a detailed reason for each adjustment.
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Attach any supporting documentation, such as new income statements, receipts, or deduction details, as required by the ATO.
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Submit your amendment and keep a record of your submission. The ATO will review it and issue a new notice of assessment.
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