To dispute a SARS auto-assessment in 2026, you do not lodge a formal objection first; you file a corrected ITR12 return. Log in to eFiling or the SARS MobiApp, open the auto-assessment, edit the incorrect figures or add missing information, and submit your amended return before the applicable filing deadline.
What does a SARS auto-assessment actually mean?
Between 1 and 12 July 2026, SARS issued auto-assessments to millions of taxpayers whose tax affairs it considers straightforward. An auto-assessment is SARS estimating your tax outcome using third-party data it already holds, such as IRP5 certificates from employers, interest certificates from banks, retirement annuity contributions and medical scheme records.
SARS increasingly receives data from crypto exchanges and participates in international exchange-of-information frameworks, so its picture of your finances is broader than it once was. The auto-assessment is a proposed outcome, not a final verdict you are stuck with. If the figures match your records, you can accept it and do nothing further. If they do not, you have the right to correct it.
If you have only received the SMS or email and are not yet sure how to respond, our companion guide on what to do when you get the SMS covers the first steps.
How to dispute a SARS auto-assessment: the correct route
Many taxpayers assume that disagreeing with SARS means lodging a formal dispute or objection straight away. During filing season, that is usually the wrong first move. When an auto-assessment is wrong or incomplete, the mechanism is to file a full, corrected return rather than to object.
Here is why. An auto-assessment reflects only the data SARS could gather automatically. It often leaves out deductions and income that only you know about, for example additional medical expenses not covered by your scheme, home office claims, travel allowances, rental income or crypto disposals. Filing a corrected ITR12 lets you present the complete position.
The formal dispute process, an objection and later an appeal, generally comes into play after you have filed and SARS has issued an assessment you still disagree with on a point of law or fact. For a simple case of missing or wrong figures, you correct and resubmit.
How do I reject and edit an auto-assessment on eFiling?
You can amend an auto-assessment through eFiling on a computer or through the SARS MobiApp. The steps are broadly the same.
- Log in to your eFiling profile or open the MobiApp.
- Navigate to the Income Tax Work Page and open the 2026 return that carries the auto-assessment.
- Select the option to edit or file the return. This opens the ITR12 populated with SARS data.
- Review each source code and amount against your own certificates and records.
- Add missing income, correct wrong values, and complete any deduction sections that were left blank.
- Submit the amended return.
Once you submit a corrected return, SARS reassesses your position and issues a revised assessment. That revised outcome, not the original auto-assessment, becomes the figure that counts.
What should I check before I resubmit?
Accuracy matters more than speed. Before you submit, reconcile the return line by line against your documents. Our list of documents needed to file your tax return is a useful reference here.
Common items that auto-assessments miss or misstate include:
- Medical expenses paid out of pocket that were not submitted to your scheme.
- Retirement annuity contributions not linked to your IRP5.
- Home office expenses where you meet SARS requirements.
- Travel claims supported by a logbook.
- Rental income and the related deductible expenses.
- Income from a side hustle or freelance work.
- Crypto asset disposals, whether they resulted in a gain or a loss.
If you earn income outside your salary, read our guide on how to declare side hustle income. Leaving that income off an auto-assessment does not make it disappear; SARS may already hold the data and can reassess later.
How do crypto disposals change an auto-assessment?
Crypto is one area where auto-assessments are frequently incomplete. SARS may receive some exchange data, but it usually does not have a full view of your cost base, transfers between wallets, or disposals on offshore platforms. That means an auto-assessment can either overstate or understate your crypto position.
SARS generally treats crypto assets as subject to tax, either as revenue or as capital, depending on your intention and activity. Working out which applies affects how gains and losses are reported. If you traded or disposed of crypto during the year, you will likely need to correct the auto-assessment to reflect the true outcome.
Losses are worth attention too. Our article on the impact of crypto losses on your tax return explains how a loss may reduce your liability when reported correctly. Because the revenue versus capital question is fact specific, it is worth confirming your treatment with a professional before you resubmit.
What are the deadlines for correcting an auto-assessment in 2026?
Filing opened on 13 July 2026. The deadline depends on your taxpayer type.
| Taxpayer type | Deadline to file or correct the 2026 return |
|---|---|
| Non-provisional taxpayers | 23 October 2026 |
| Provisional taxpayers (ITR12) | 22 January 2027 |
If you are unsure whether you are a provisional taxpayer, that status usually applies to people earning income that is not subject to PAYE, such as rental or business income. Provisional taxpayers also submit IRP6 returns, with periods tied to the last business day of August and the last business day of February. Our guide on the IRP6 first provisional tax calculation explains that process.
Missing the deadline can trigger SARS administrative penalties, which recur monthly and scale with your taxable income. Correcting an auto-assessment on time avoids that risk.
What happens after I resubmit my corrected return?
After you submit an amended ITR12, SARS reassesses and may select the return for verification. This is a routine review where SARS asks you to upload supporting documents to confirm the figures you claimed. It is not the same as an audit, though certain patterns can prompt closer scrutiny.
Keep your certificates, logbooks, invoices and crypto records ready. Our verification of supporting documents guide walks through what to expect. If your corrected return results in a refund, payment can take longer when a verification is in progress; see our article on why a SARS refund is delayed and how to get paid.
If SARS issues a revised assessment and you still disagree on a matter of fact or law, that is the point at which the formal dispute process becomes relevant. You would then lodge an objection within the prescribed period, supported by reasons and documents. Certain claims, such as large deductions or unusual income patterns, can attract attention, which our overview of common red flags that trigger SARS audits discusses.
Frequently Asked Questions
Do I have to accept my SARS auto-assessment?
No. An auto-assessment is a proposed outcome based on the data SARS holds. If it is accurate and complete, you can accept it or take no action. If it omits income or deductions, or contains wrong figures, you have the right to file a corrected ITR12 return before your filing deadline, and SARS will reassess based on the fuller information you provide.
Is correcting an auto-assessment the same as lodging a dispute?
Not during filing season. When an auto-assessment is wrong or incomplete, you correct it by editing and resubmitting your return, not by lodging a formal objection. The formal dispute process, involving an objection and possibly an appeal, generally applies after you have filed and SARS issues an assessment you still disagree with on a point of fact or law.
Can I still fix a mistake after I accepted the auto-assessment?
In many cases yes, provided you act within the filing window. You can open the return on eFiling or the MobiApp, make the corrections and resubmit before your deadline. SARS will then issue a revised assessment. If the correction adds income you previously omitted, submitting the amendment voluntarily is usually better than waiting for SARS to reassess later.
What if my auto-assessment left out my crypto transactions?
You should correct the return to reflect your crypto disposals. SARS may hold partial exchange data but often lacks your full cost base and offshore activity. Crypto is generally taxable, either as revenue or capital depending on your circumstances, so accurate reporting matters. Because the treatment is fact specific, it is worth confirming your position with a professional before resubmitting.
Will correcting my auto-assessment trigger a SARS audit?
Correcting a return does not automatically cause an audit. SARS may select the amended return for verification, which is a routine document check rather than an audit. Keeping accurate records and reporting all income reduces risk. Certain patterns, such as unusually large claims, can attract closer attention, so support every figure with the relevant certificates, invoices or logbooks.
Need help correcting your assessment?
If your auto-assessment does not reflect your true position, we can help you review the figures, complete the missing sections and resubmit correctly before your deadline. Book a call to discuss your specific circumstances, or email info@chconsulting.co.za with your questions and we will point you in the right direction.