ATO Identity Theft: How It Affects Your Tax Return in Australia

Discovering that your personal information has been compromised can be extremely stressful. When identity theft affects your tax return, the situation can quickly become confusing and frustrating.

In Australia, criminals sometimes use stolen personal information—especially your Tax File Number (TFN)—to lodge fraudulent tax returns and claim refunds illegally.

This guide explains how tax identity theft happens, warning signs to watch for, and the steps you should take immediately to protect yourself and resolve the issue with the Australian Taxation Office.

How Tax Identity Theft Can Affect Your Tax Return

Yes, identity theft can significantly impact your tax return in Australia.

If someone gains access to your Tax File Number (TFN) and personal details, they may attempt to lodge a fake tax return in your name to steal your refund.

Common consequences include:

• Delayed tax refunds while the ATO investigates suspicious activity
• Incorrect tax records associated with your TFN
• Difficulty lodging your legitimate tax return
• Changes to your myGov or bank details without your permission
• Stress and additional verification procedures to confirm your identity

Acting quickly is critical to minimise damage and protect your financial identity.

How Tax Identity Theft Happens in Australia

Understanding how criminals obtain personal information helps reduce your risk.

Phishing Scams

Phishing is one of the most common tactics used by scammers.

Fraudsters send fake emails or SMS messages pretending to be from government agencies such as the
Australian Taxation Office or
Services Australia.

These messages often claim:

• You have an urgent tax debt
• You are eligible for a tax refund
• Your account needs verification

Clicking the link usually leads to a fake website designed to steal your login details and TFN.

Data Breaches

Cyberattacks on organisations can expose sensitive customer data. Criminals often buy this information online and combine it with other data to impersonate individuals.

Malware and Spyware

Malicious software installed through unsafe downloads or suspicious links can record your keystrokes, capturing:

• passwords
• TFN
• banking details

These details can then be used to access your ATO or myGov accounts.

Signs Your Tax Return May Be Affected

Early detection can reduce the damage caused by tax identity theft.

Watch for these warning signs:

You Cannot Lodge Your Tax Return

This may mean someone has already lodged a fraudulent return using your TFN.

You Receive an Unexpected Notice of Assessment

If the ATO sends a notice showing income or deductions you don’t recognise, a fraudulent return may have been submitted

Your myGov Details Have Changed

Changes to your bank account, email address, or phone number without your knowledge may indicate unauthorised access.

Your Refund Is Delayed

The ATO may temporarily freeze accounts if suspicious activity is detected.

What Happens If the ATO Detects Identity Theft

The
Australian Taxation Office
uses sophisticated data analytics to identify unusual tax activity.

If suspicious behaviour is detected:

1. Your account may be temporarily locked or restricted.
2. Your tax return may be placed under review.
3. The ATO may request identity verification documents.

While this process protects taxpayers, it can delay your legitimate refund until the matter is resolved.

What To Do If You Suspect Tax Identity Theft

If you believe someone has used your identity to lodge a tax return, take these steps immediately.

1. Contact the ATO

Call the ATO’s Client Identity Support Centre and report a suspected identity compromise.

An officer will:

• secure your account
• begin an identity verification process
• investigate fraudulent activity

2. Secure Your myGov Account

Immediately:

• change your password
• enable multi-factor authentication (MFA)
• review your linked services

3. Report the Cybercrime

Submit a report to the
Australian Cyber Security Centre.

This creates an official record of the incident and assists national cybercrime investigations.

4. Check Your Credit File

Identity theft can lead to financial fraud beyond tax returns.

Request your credit report from agencies such as:

• Equifax
• Experian
• Illion

Look for suspicious credit applications or loans.

How to Protect Your Tax Return in the Future

Prevention is the most effective defence against tax identity theft.

Strengthen Your myGov Security

Enable Multi-Factor Authentication (MFA) and use a strong password that is not used elsewhere.

Protect Your Tax File Number

Treat your TFN like a bank password.

Only provide it to authorised organisations such as:

• your employer
• your super fund
• your registered tax agent

Identify Phishing Attempts

Be cautious of messages claiming to be from the ATO asking for personal information.

Always access official services by typing the website directly into your browser.

Example: Identity Theft Causing a Delayed Refund

Consider the example of Sarah, a small business owner in Sydney.

Sarah lodged her tax return expecting a refund of around $6,000. After several weeks without payment, she contacted the ATO.

The investigation revealed that another tax return had been lodged using her TFN with different bank details.

Fortunately, the ATO’s fraud detection system stopped the fraudulent payment.

However, Sarah’s account was frozen until she completed a detailed identity verification process. After several weeks and documentation checks, the fraudulent return was removed and her legitimate refund processed.

This example shows how identity theft can quickly disrupt the tax process.

Common Mistakes That Increase Risk

Ignoring ATO Letters

Never assume official correspondence is a mistake.

Always verify notices by logging into your account directly.

Reusing Passwords

Using the same password across multiple platforms increases the risk of identity theft.

Clicking Suspicious Links

Avoid clicking links in unexpected tax-related messages.

Access official services manually through the correct website.

Checklist: Protect Your Tax Identity

Use this checklist to protect your tax information.

• Enable MFA on your myGov account
• Use a strong, unique password
• Never share your TFN unnecessarily
• Avoid clicking links in unexpected emails or SMS messages
• Shred documents containing personal information
• Monitor your credit report for unusual activity
• Contact the ATO immediately if you suspect fraud

How Supertax Can Help Protect Your Tax Identity

At Supertax, we understand how stressful dealing with identity theft and ATO investigations can be.

Our experienced tax professionals help clients manage and resolve identity-related tax issues quickly and effectively.

ATO Communication Support

We liaise directly with the
Australian Taxation Office

on your behalf to resolve identity theft cases and correct tax records.

Identity Verification Assistance

Our team guides you through the required documentation and verification procedures to restore access to your tax account.

Secure Tax Lodgement

By working with a registered tax agent, your tax returns are lodged securely and monitored for suspicious activity.

Preventive Tax Security Advice

We help clients implement stronger security practices, including:

• protecting TFN information
• securing myGov accounts
• monitoring tax records for unusual activity

Ongoing Tax and Compliance Support

Beyond identity theft protection, Supertax assists clients with:

• tax return preparation
• ATO dispute resolution
• business accounting services
• tax planning strategies

Our goal is to ensure your tax affairs remain secure, compliant, and stress-free.

Frequently Asked Questions

Can someone lodge a tax return using my identity?

Yes. If criminals obtain your TFN and personal details, they can attempt to lodge a fraudulent tax return in your name.

Why is my tax refund delayed?

If the ATO detects suspicious activity or duplicate returns linked to your TFN, your account may be temporarily frozen during the investigation.

Will the ATO fine me if my identity is stolen?

No. Victims of identity theft are not penalised, provided the issue is reported promptly.

Do I need a new TFN after identity theft?

In most cases, the ATO will add extra security monitoring to your existing TFN rather than issuing a new one.

How long does it take to resolve identity theft with the ATO?

Resolution times vary depending on the complexity of the case but may take several weeks while identity verification and investigations are completed.

Secure Your Tax Affairs With Supertax

If you suspect tax identity theft or your tax return has been delayed due to suspicious activity, professional guidance can make the process much easier.

Supertax helps individuals and businesses manage ATO communication, resolve identity issues, and secure their tax records.

Our experienced team ensures your tax matters are handled quickly, professionally, and with complete confidentiality.