An auto-assessment notification feels like a relief, and clicking accept feels like the path of least resistance. But if missing rental income, an unclaimed home office deduction, or a second IRP5 was never factored in, your silence legally counts as agreement, and you become responsible for those numbers.
The system works well for a single salary with no additional complexity. It works far less well the moment your financial life has more than one moving part, and that's not a flaw in the system, it's simply the limit of what automated third-party data can capture.
Unclaimed deductions are the most common gap: home office expenses, provided you meet the strict criteria and work from home more than half your time; travel logbooks, which SARS cannot auto-calculate under any circumstances; and Section 18A donation certificates, which need to be uploaded manually even though the giving itself was genuine and generous.
Missing income streams are the second gap. Freelance or side-hustle earnings, rental income even from a single room, and capital gains tax on any asset sold during the year all require you to add them yourself. SARS has no way to know about income it was never told about.
Third-party certificate delays cause the third kind of gap. A previous employer submitting an IRP5 late, or a medical aid provider missing the data sync window, both leave holes in an otherwise complete-looking assessment.
You typically have until the standard season deadline, usually late October for non-provisional taxpayers, to review and correct an auto-assessment. Miss that window without editing or rejecting it, and SARS treats your inaction as agreement. If an audit later uncovers the gap, you're facing administrative penalties, underestimation fines, and interest, all avoidable with a proactive review.
Log into eFiling and choose to edit rather than accept. Gather your logbooks, medical certificates, IT3(b) investment certificates and proof of any additional income. Update the relevant sections manually, and submit the corrected version before the season deadline closes.
Don't accept on notification alone. Review the full breakdown before deciding anything.
Gather supporting documents first. Logbooks, certificates, and proof of any additional income streams.
Edit directly rather than accept-then-correct. It's cleaner and faster than a Request for Correction after the fact.
Submit before the season deadline. Late corrections and outright non-response both carry penalty risk.
You can still submit a Request for Correction via eFiling, ideally within 21 business days of the original assessment.
It can trigger a request for supporting documents, which is a routine part of the process provided you have valid records to substantiate your claims.
Yes. The legal duty to declare all income sits with the taxpayer, regardless of what third-party data happened to be complete at assessment time.
An auto-assessment is a proposal built from partial data, not a guarantee of accuracy. Review it, correct what's missing, and submit before the deadline, since silence is treated as agreement either way. For related tax guidance, see our blog, and current SARS information.
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