4.3.4. Immediate disclosure of information (SII)

On July 1, 2017, the VAT management system began to be applied, based on the Immediate Supply of Information (SII) . This system, mandatory for certain taxpayers and optional for the rest, represented a radical transformation in tax processing, both from the point of view of assistance and control.

The SII is not only a taxpayer assistance tool, but also an important tool to help prevent tax fraud. From the point of view of assistance, in a first phase, the taxpayer is provided with the imputations deduced from the information that appears in the Tax Agency databases and, in a second phase, help will be provided for the preparation of the VAT self-assessment.

The SII allows you to compare invoices, both VAT paid and VAT accrued. The high degree of taxpayer compliance in the registration of both types of invoices will allow the Tax Agency to determine which taxpayers have greater or lesser tax compliance and, therefore, minimize the inconvenience caused for those taxpayers with higher compliance percentages. through verification procedures, as well as expediting the payment of monthly VAT refunds.

The use of the SII has made it possible to reduce the average risk-free processing time for returns from SII taxpayers, which was 13 days in 2020.

Furthermore, the quality of the information received has been greatly increased.