The Federal Tax Authority (FTA) provides a VAT Voluntary Disclosure form to allow your business to notify the FTA about any errors or changes in a VAT Returns or VAT Refund. VAT Form 211 or VAT Voluntary Disclosure form assist you in correcting the mistakes you might have committed while submitting a VAT Returns or applying for a VAT Refund. It would be best if you did the VAT Voluntary Disclosure of your VAT Returns or VAT Refund within 20 business days from the date you were aware of the error.