Last updated: September 2026
TL;DR
- Understated tax above AED 10,000: a Voluntary Disclosure will generally be required within 20 business days from the date you become aware of the error.
- Understated tax of AED 10,000 or less: correction through a return is available only if an eligible return can carry the adjustment; without one, a Voluntary Disclosure is still required within 20 business days.
- Overstated tax and errors that do not change the tax amount follow different rules and must be assessed separately.
- Corporate Tax and VAT share the same procedural framework, but calculations and submissions must remain separate by tax and Tax Period.
Your business has already filed its return when a finance review identifies an error in revenue, input tax, expense classification or a Corporate Tax adjustment. The riskiest response is to carry the difference into the next period before determining what the law requires.
On the day the error is discovered, preserve the original return, submission receipt and calculation workpapers. Create a separate correction version and record who found the error, the discovery date, the relevant tax and the Tax Period. That date may determine when the 20-business-day period begins.
Classify the Legal Effect Before Choosing a System Action
Article 10 of Federal Decree-Law No. 28 of 2022 first distinguishes three outcomes: understated tax must be disclosed; overstated tax may be disclosed; and an error that does not change the tax amount is corrected either through a Voluntary Disclosure in circumstances specified by the Federal Tax Authority (FTA), or through a Tax Return. These requirements are subject to the latest official publication.
Article 10 of Cabinet Decision No. 74 of 2023 then sets out the AED 10,000 threshold for understated tax, the conditions for an eligible return to carry the correction, and the 20-business-day deadline. These requirements are subject to the latest official publication. (Source: UAE Legislation, Federal Decree-Law No. 28 of 2022 and Cabinet Decision No. 74 of 2023, September 2026)
⚠️ AED 10,000 determines the correction route; it is not an exemption below which no action is needed. Legislation and system channels may change, so confirm the latest publications from the FTA and UAE Legislation before filing.
The Five-Path Tax Return Correction Card
First recalculate the correct Payable Tax by tax type and period, then place each error into one of the paths below. Do not net Corporate Tax against VAT or combine multiple VAT periods into a single assessment.
| Path | Decision condition | Usual action | Records to retain |
|---|---|---|---|
| A | Understated tax above AED 10,000 | Submit a Voluntary Disclosure within 20 business days from becoming aware of the error | Recalculation, approval, disclosure receipt, additional tax and penalty records |
| B | Understated tax of AED 10,000 or less, with an eligible return available | Correct the error in the eligible return in the statutory order | Eligibility rationale, affected fields and approval record |
| C | Understated tax of AED 10,000 or less, with no eligible return available | Submit a Voluntary Disclosure within 20 business days from becoming aware of the error | Basis for concluding that no eligible return exists, plus submission receipt |
| D | Overstated Payable Tax | A Voluntary Disclosure may be filed, alongside the chosen treatment of the credit balance, offset or refund | Recalculation, rationale for the chosen route and follow-up records |
| E | No change to the tax amount | Check whether the error falls within an FTA-specified disclosure circumstance; otherwise correct it through a Tax Return | Field impact, current guidance and submission receipt |
Path B is the most commonly misunderstood. A difference equal to or below AED 10,000 does not automatically mean “put it in the next return.” Correction through a return is available only where a return described in Article 10(1)(b)(1) exists, has not yet become due and can carry the correction; otherwise, Path C applies. These requirements are subject to the latest official publication.
An incorrect refund application should not automatically be treated as Path D. If the error changes the refundable amount, assess it separately under Article 10(2) or 10(4) of Federal Decree-Law No. 28 of 2022 and Article 10(2) of Cabinet Decision No. 74 of 2023. These requirements are subject to the latest official publication.
Corporate Tax and VAT: One Decision Framework, Separate Filing Tracks
Corporate Tax
Lock down the annual Tax Period, Corporate Tax return, financial statements, taxable-income adjustments and final tax liability. If the issue involves a Free Zone, Tax Group, relief or transfer pricing, review the relevant eligibility and legal basis before changing the resulting figure.
Corporate Tax is generally administered by annual period. If there is no eligible return that meets the statutory conditions, your business cannot simply copy the periodic VAT approach and wait for the next year. The applicable filing route remains subject to the latest official publication.
VAT
For each VAT period, identify the affected return boxes, date of supply, output tax, input tax and tax invoice. Recalculate each affected period separately so that a net total does not conceal an understatement above AED 10,000 in one period.
Where one transaction affects both Corporate Tax and VAT, the facts and root cause can be reviewed together. The two taxes must nevertheless be calculated, approved and submitted through their respective channels, with separate receipts retained.
How to Assign the Responsibility Chain Within 20 Business Days
Once an error is discovered, use the available time to form a submission-ready position rather than repeatedly testing changes in system fields.
- T0 | Preserve evidence: Save the original return, receipt and workpapers; record the discovery date; and pause manual adjustments that could duplicate or increase the difference.
- T1 | Recalculate by tax: Document the original amount, correct amount, difference and effect on Payable Tax.
- T2 | Select the path: Have the tax reviewer confirm one of the five paths and record the applicable provisions.
- T3 | Approve and submit: The authorized person approves the disclosure, correction, payment or refund arrangement, and the filer uses the relevant EmaraTax channel.
- T4 | Archive and improve controls: Retain the filing, receipt, payment evidence and communications, then correct the accounting mapping and review controls.
💡 Our recommendation: arrange professional review on the discovery date where the error spans periods or taxes, or involves judgment-based tax treatment. Professional review does not automatically suspend a statutory deadline, so document preparation and route assessment should proceed in parallel. Applicable deadlines remain subject to the latest official publication.
Documents to Prepare Before Submission
- Tax type, Tax Period, original submission date, discovery date, person who identified the error and original filing receipt;
- Original amount, correct amount, difference, direction of the Payable Tax effect and the AED 10,000 threshold assessment;
- Fields and periods affected separately for Corporate Tax and VAT, including any cross-period effect;
- Applicable provisions, verification date and the FTA system channel currently available;
- Details of the preparer, reviewer, authorizer and filer;
- Corrected return or Voluntary Disclosure, attachments, receipt, and payment or refund records.
Frequently Asked Questions
Q: Can an AED 9,000 understatement simply be corrected in the next return?
Not necessarily. The correction can be made through a return only if an eligible return described by the legislation exists and has not yet become due. If no eligible return is available, a Voluntary Disclosure must be submitted within 20 business days from becoming aware of the error. These requirements are subject to the latest official publication.
Q: Which path applies if the understatement is exactly AED 10,000?
Article 10(1)(b) of Cabinet Decision No. 74 of 2023 applies where the amount is equal to or below AED 10,000. Only an amount above AED 10,000 falls under Article 10(1)(a). These requirements are subject to the latest official publication.
Q: Is a Voluntary Disclosure mandatory if the business overpaid tax?
Article 10(3) of Federal Decree-Law No. 28 of 2022 provides that the taxpayer may submit a Voluntary Disclosure, unlike the mandatory disclosure rule for understated tax. The business should still make and document a clear decision based on the intended treatment of the credit balance, offset or refund. These requirements are subject to the latest official publication.
Q: Can an incorrect figure be ignored if the tax amount does not change?
No. Check whether the error falls within an FTA-specified Voluntary Disclosure circumstance. If it does not, correct it through the Tax Return as required. These requirements are subject to the latest official publication.
Action Checklist
- Preserve the original return and receipt immediately; do not overwrite the original workpapers.
- Record the date the business became aware of the error and manage the 20-business-day period from that date.
- Recalculate Corporate Tax and VAT separately; do not net across taxes or periods.
- Assess the tax direction, the AED 10,000 threshold and the availability of an eligible return, in that order.
- Complete the tax review, authorization and evidence file before entering the relevant EmaraTax channel.
If your team cannot yet determine which path applies, or the issue spans multiple periods, Free Zone eligibility, a Tax Group or transfer pricing, the next step is a focused review of the facts and filing route: Schedule a 30-minute complimentary assessment
Last updated: September 2026. This content is for informational purposes only and does not constitute legal or tax advice. For professional consultation, please contact the MIRISE team.