Do I need to wait for my notice of assessment

Generally, the original return should first be processed. The notice of assessment also helps establish when the amendment period begins.

Can I add a missed deduction after lodging

A missed eligible deduction may be added where the ordinary deduction and record-keeping requirements are satisfied and the amendment is made within the applicable time limit.

What if I forgot to declare income

Omitted income may need to be corrected. The amendment could result in additional tax, interest or a penalty depending on the circumstances. These outcomes are not automatic in every case.

How far back can I amend a tax return

Most individuals generally have two years from the day after the ATO gives the notice of assessment. Different periods can apply to sole traders and other taxpayers, particularly for 2024-25 and later income years.

Will amending my tax return result in a penalty

Not automatically. Penalty treatment depends on the error, whether it caused a tax shortfall, the taxpayer's conduct and when and how the correction was disclosed. Interest can apply separately.

When should I lodge an objection instead

An objection may be appropriate where you disagree with an ATO assessment or decision rather than correcting information you originally provided. It may also need to be considered where the amendment period has expired.

Can an accountant amend my tax return

A registered tax agent can review the lodged return, identify the required corrections and prepare or lodge an amendment on your behalf. Complex matters may require separately scoped tax advice.

Back to Individual Tax Hub

Pillar 1.11 • Tax Return Amendment Practice

Tax Return Amendment Services for Individuals

Already lodged your tax return and later found a mistake, missing income or a deduction that was not handled correctly? A tax return amendment is used to correct information in a return that has already been lodged and processed by the Australian Taxation Office (ATO).

Financially Up Pty Ltd helps Australian individuals review lodged returns, identify possible errors or omissions and prepare amendment requests where appropriate. This service is for correcting a return that has already been lodged. If an earlier return has not been lodged at all, our prior-year and overdue tax returns service may be more relevant.

Your Initial Appointment:Book an Appointment to discuss the affected income year, what has changed or been discovered, the available records and any ATO correspondence. An amendment outcome, refund or tax saving cannot be confirmed before the circumstances and supporting information are reviewed.

Notice of Assessment ReconciliationStatutory 2-Year & 4-Year Time Limit AuditsVoluntary Disclosure Penalty MitigationRegistered Tax Agent #26242127

Service at a Glance

Personalized scope & lodgement

2024–25 Open

Suitable For

Individuals & sole traders needing to correct an already-lodged and processed return

Core Prerequisite

Original Notice of Assessment issued and processed by the Australian Taxation Office

Time Limits

Generally 2 years from assessment (4 years for eligible business taxpayers from 2024-25)

Impact Analysis

Complete recalculation of taxable income, Medicare levy, offsets & HECS/HELP

Delivery Format

100% online video meetings (Outlook Calendar) or in-person by arrangement

Lodgement Channel

Direct electronic ATO Tax Agent Portal transmission by TPB Agent #26242127

Registered Tax Agent #26242127

Guaranteed

Pre-lodgement draft walkthrough & written client sign-off
Extended ATO tax agent lodgement deadlines available
Transparent upfront quoting & zero lodgement without approval

Online Outlook video meetings or in-person consultations

Fast online appointmentBook now

10+ Years

Tax Amendment Experience

TPB #26242127

Registered Tax Agent

CPA & IPA

Qualified Specialists

Australia-Wide

Virtual & In-Person

Correction Framework

What Is a Tax Return Amendment?

A tax return amendment is a request to change information in a return that has already been lodged and processed. It may be needed to correct an error, include omitted information or replace an amount when more accurate information becomes available.

Processed Return

Tax Return Amendment

Core focus: Information correction

Unprocessed / Missing

Overdue or Unlodged Return

An amendment is different from an overdue return. An overdue or unlodged return has not yet been lodged, whereas an amendment corrects a return that has already been processed.

Disputed Decision

Formal ATO Objection

It is also different from an objection. An amendment generally corrects information originally provided in the return. An objection may be relevant where you disagree with an assessment or another objectionable ATO decision, or where the normal amendment period has expired.

Core focus: Legal dispute of ATO decision

Prerequisite: Notice of Assessment ProcessingThe original return must generally be fully processed by the ATO before an amendment request can be accepted. Lodging an amendment while the initial return is still processing can cause processing delays or rejections.

Common Triggers & Scenarios

When Should You Amend a Tax Return?

You may need to amend a tax return when the information originally lodged was incomplete or incorrect. Common examples include:

omitted salary, bank interest, dividends or other income;

incorrect income amounts;

a missed eligible deduction;

a deduction claimed incorrectly or without sufficient support;

an amended employer income statement;

missing investment or managed-fund information;

foreign income reported incorrectly;

incomplete share, cryptocurrency or rental property information; or

a capital gain or capital loss that was not reported correctly.

Process Evaluation:Not every difference necessarily requires an amendment. The appropriate process depends on the issue, the affected income year, the available evidence and whether the matter involves correcting information or disputing an ATO decision.

Pre-Amendment Due Diligence

Before Requesting an Amendment

The original return should generally be processed before an amendment is requested. Check the notice of assessment, the lodged return and the records supporting the proposed correction.

For each affected item, identify:

The amount currently shown

Identifying the exact reported line item on the original lodged tax return and notice of assessment.

The correct total amount

Recalculating the revised figure using verified primary source documents and statements.

Why the original amount was incorrect

Formulating a clear, factual explanation of the omission, revised information, or calculation error.

The records supporting the correction

Assembling substantiating invoices, bank feeds, amended employer PAYG statements, or broker reports.

Systemic Impact: Why Full Return Review Is Essential

A change to one item can affect other calculations, including taxable income, tax offsets, the Medicare levy, study or training loan repayments, capital losses and other income-tested obligations. The complete affected return should therefore be reviewed rather than changing one figure in isolation.

ATO Determinations & Notice of Assessment

What Happens After an Amendment

The ATO may accept the amendment, request further information or make a different decision based on the information available. If the amendment is processed, the ATO will generally issue an amended notice of assessment.

Depending on the correction, the result may be:

additional tax to pay;Liability

a larger refund;Refund

a reduced refund;Adjustment

no change to the amount payable or refundable; orNil Impact

changes to other tax calculations.Tax Offsets/Levies

Debt Offsetting & Shortfall Interest Charge (SIC):Any refund may also be applied against existing ATO or other government debts where the law permits. If the amendment increases the tax payable, shortfall interest charge may apply. A penalty may also be considered where an incorrect statement created a tax shortfall, depending on the nature of the error and the taxpayer's conduct.

Voluntary Correction vs Audit Findings:Voluntarily correcting an error may affect the ATO's penalty treatment, but it does not guarantee that interest or penalties will be reduced or remitted. Proactive disclosure before an ATO audit or enquiry is initiated generally provides the best pathway for penalty mitigation.

Statutory Time Limits

Can You Amend Previous Years?

There are time limits for requesting an amendment. Most individuals generally have two years from the day after the ATO gives the notice of assessment.

Two-Year vs Four-Year Rules

Sole Trader Statutory Windows

Sole traders generally had a two-year amendment period for 2023-24 and earlier income years. For 2024-25 and later income years, eligible sole traders and other qualifying business taxpayers may generally have four years to request an amendment. Different rules can apply, so the relevant income year, assessment date and circumstances should be checked.

Expired Time Limits

Objections & Extension of Time

If the amendment period has expired, an objection may need to be considered. If the objection period has also expired, a request for an extension of time to object may be required. Availability and acceptance depend on the circumstances.

Where several years are affected, each lodged return should be reviewed separately. Amending one year does not automatically correct another year.

Practical vs Complex Amendments

Common Tax Return Amendment Issues

Many amendments involve practical errors discovered after lodgment, such as an amended income statement, omitted interest, an incorrect work-related expense or a deduction that was not properly apportioned between business and private use.

Practical Everyday Corrections

Routine Post-Lodgment Discoveries

Complex & Multi-Asset Matters

Investments, Offshore & CGT

More complex amendments can involve foreign income, rental properties, share transactions, cryptocurrency, carried-forward losses or capital gains. If the correction involves a disposal of property or investments, our capital gains tax page explains the broader CGT service.

Detailed tax advice, calculations or reviews outside the amendment itself may need to be scoped separately.

Structured Methodology

How the Amendment Process Works

A transparent, 6-step pathway to ensure amendments are thoroughly supported, accurately prepared, and submitted through official ATO digital lodgment channels.

Confirm the affected year.

Tell us which return may require correction and why

Provide the lodged return and assessment.

Supply the original return, notice of assessment and any previous amendments

Provide supporting records.

Relevant documents may include income statements, receipts, investment reports, foreign-income records, rental property information and ATO correspondence

Review the proposed correction.

We review the existing figures, corrected totals, available evidence and any related tax calculations

Prepare the amendment request.

If an amendment is appropriate, the corrected information and explanation are prepared. Subject to authorization and the agreed scope, the request may be lodged using the appropriate ATO channel

Review the ATO outcome.

Once processed, the amended notice of assessment can be checked against the amendment request, including any additional tax, refund, interest, penalty or payment due date

Professional Practice Scope

How Financially Up Can Help

For tax return amendment matters, Financially Up Pty Ltd can assist with:

Practice Capabilities

Our Tax Return Amendment Scope

reviewing the lodged return and notice of assessment;

Examining original lodgment lines, tax tables applied, and baseline assessment notices.

identifying possible errors or omissions;

Detecting unreported earnings, missing deductions, or discrepancies in reported figures.

checking the supporting records;

Validating primary source receipts, bank feeds, payment summaries, and dividend vouchers.

considering whether an amendment appears to be the appropriate process;

Confirming statutory time limits and verifying if an amendment or formal objection is required.

preparing corrected amounts and explanations;

Recalculating revised taxable income and drafting comprehensive reasons for adjustment.

preparing or lodging the amendment where authorised and included in the agreed scope; and

Direct electronic transmission via the ATO Tax Agent Portal under client authorization.

reviewing the amended notice of assessment.

Auditing the final ATO Amended Notice of Assessment, refund calculations, or revised liabilities.

Where the issue requires separate tax advice, reconstruction of records or a more detailed review, the additional work can be discussed and scoped before proceeding.

Individual Tax Hub

Registered Tax Agent Support

Discovered a Mistake on Your Already-Lodged Tax Return?

We can help determine whether an amendment appears appropriate, what information is required and whether any related tax advice should be scoped separately.

Answers & Clarity

Frequently Asked Questions

Common questions about amending lodged tax returns, time limits, penalties, missed deductions and objections with Financially Up.

8 Frequently Asked Questions

Click to expand

It is a request to correct information in a tax return that has already been lodged and processed, subject to the applicable ATO rules and time limits.

Still have unanswered questions?

Speak directly with our Australian registered CPA tax accounting team.

Ready When You Are

Book an Appointment

Need to amend a tax return? Book an appointment with Financially Up to discuss the lodged return, what needs to be corrected, the available records and any ATO correspondence. We can help determine whether an amendment appears appropriate, what information is required and whether any related tax advice should be scoped separately.

Related Services:

•••