You cannot edit a submitted UAE corporate tax return. A correction is filed as a new submission on EmaraTax, and where the change reduces the tax due — or increases a refund claimed — the law requires a Voluntary Declaration to the Federal Tax Authority under Article 10 of Federal Decree-Law No. 28 of 2022 on Tax Procedures. Filing it correctly, and within the deadlines, is the difference between a quiet correction and a penalty.
TL;DR
- An incorrect return that understates the tax due must be corrected with a Voluntary Declaration (Article 10(1)); an error with no tax difference is corrected in the next return, or via a Voluntary Disclosure where the FTA requires it (Article 10(5)).
- The Executive Regulations require a Voluntary Declaration within 20 business days of becoming aware of the error.
- A voluntary disclosure generally cannot be filed more than five years after the end of the relevant tax period.
- Penalties for an undisclosed incorrect return are set by Cabinet Decision No. 75 of 2023 (as amended) — they rise sharply once the FTA notifies an audit, so filing first matters.
- If the FTA has already issued a Tax Assessment, the correction route is a review application within 40 business days (Article 28), not an amended return.
Which correction route applies
| Situation | Route | Reference |
|---|---|---|
| Return understates the Payable Tax | Voluntary Declaration is mandatory | Article 10(1), Federal Decree-Law No. 28 of 2022 |
| Return overstates the Payable Tax (you overpaid) | Voluntary Declaration is optional — but needed to recover the difference | Article 10(3), Federal Decree-Law No. 28 of 2022 |
| Error with no difference in tax due | Correct in the next return, or via Voluntary Disclosure where the FTA requires it | Article 10(5), Federal Decree-Law No. 28 of 2022 |
| Refund application was overstated | Voluntary Declaration is mandatory | Article 10(2), Federal Decree-Law No. 28 of 2022 |
| FTA has already issued a Tax Assessment on the error | Application for review of the assessment, within 40 business days of notification | Article 28, Federal Decree-Law No. 28 of 2022 |
Deadlines that decide the cost
Three windows govern the correction:
- 20 business days from awareness. Once you know the return is wrong, the Executive Regulations require the Voluntary Declaration to be submitted within 20 business days. Treat the discovery date as documented — a board email, an audit working paper, anything dated.
- Five years. A voluntary disclosure generally cannot be filed after five years from the end of the relevant tax period, so old errors need the review route or professional advice before anything is filed.
- Before the audit notification. The penalty schedule treats a disclosure filed before you are notified of an FTA audit far more favourably than one filed after. The FTA notifies a tax audit at least 10 days in advance in the normal case (Article 16) — but an unplanned notification ends the voluntary route for past periods.
- Recompute the return from the books — not from the suspected line — so the corrected figures tie to the accounting records.
- On EmaraTax, submit the amended corporate tax return for the same tax period; where tax is understated, this is done through the Voluntary Declaration form designated by the FTA.
- Pay any additional tax with the declaration — the penalty exposure grows on unpaid tax, not on the filing.
- Keep the corrected computation, the original return and the payment record together; records must be retained per Article 56 of Federal Decree-Law No. 47 of 2022.
Penalty exposure if you don't correct
The penalty table in Cabinet Decision No. 75 of 2023 (as amended) covers the relevant violations: an incorrect return not corrected before the filing deadline carries a fixed penalty (AED 500), while a failure to make a voluntary declaration of an understatement before an audit notification attracts a percentage penalty on the tax difference plus a time-based monthly uplift. A December 2025 Cabinet Decision harmonised these penalties across tax types, reducing the pre-audit voluntary-disclosure penalty to 15% of the tax difference plus 1% per month — as summarised by DLA Piper — so check the FTA's current penalty table before quantifying exposure. Deliberate understatement is a different category altogether: tax evasion carries criminal penalties (Article 25 of the Tax Procedures Law), and a routine mistake should be corrected precisely so it is never read as one.
How to file the amendment
If the FTA has already assessed you, an amended return is no longer the route — the review and reconsideration process in Article 28 applies, and the committee appeal path is covered in our guide on how to appeal a corporate tax penalty in the UAE. The first-time filing process itself is in our guide on how to file corporate tax returns in the UAE.
How Finanshels handles this
We recompute from the ledger, quantify the exposure under the current penalty table before anything is filed, and submit the amendment or Voluntary Declaration with the supporting schedule attached. Book a free consultation before the FTA's letter arrives.
FAQs
Can I edit a submitted corporate tax return on EmaraTax?
No. Corrections are made through a new submission — an amended return or a Voluntary Declaration — for the same tax period, not by editing the original.
When is a voluntary disclosure mandatory for corporate tax?
Whenever you discover the filed return understates the tax due, under Article 10(1) of Federal Decree-Law No. 28 of 2022. Disclosing an overstatement is optional but is the only route to recover the difference.
How long do I have to file a voluntary disclosure?
Within 20 business days of becoming aware of the error under the Executive Regulations, and generally not after five years from the end of the relevant tax period.
What is the penalty for an incorrect corporate tax return?
A fixed penalty applies where the return is incorrect and not corrected in time, and percentage-plus-monthly penalties apply to undeclared differences under Cabinet Decision No. 75 of 2023 as amended — with materially higher exposure once an audit has been notified.
Last reviewed: September 2026 by Gautam Sanoj, Associate Manager – Tax Advisory, Finanshels. Rules as of Federal Decree-Law No. 28 of 2022 and Cabinet Decision No. 75 of 2023 (as amended); verify current deadlines and penalty rates against the FTA (tax.gov.ae) before acting.
