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.

In relation to the SII, a web service has been developed to consult whether to be registered in the equivalence surcharge (VAT Mass Web service for consulting retailers in the equivalence surcharge), a new OSS key; improvements in invoice validations to increase their quality; improvements in the calculation of aggregate books for PRE303, particularly for the last period of the year (fourth quarter or 12th month depending on the taxpayer).