SDI-00311
Error Guide
🇮🇹 SDI-00311: Ritenuta d'acconto calculation error in Italy
ErrorMandatoryManual Fix
Withholding tax (ritenuta d'acconto) amount must exactly match the base amount × declared rate calculation. Any discrepancy causes rejection.
Quick Facts
Severity
Error (rejection)
Ruleset
FatturaPA
Mandate
B2B Mandatory
Fix Type
Manual
Why This Matters in Italy
Italy requires e-invoicing using FatturaPA (XML). Invoices with this error will be rejected. They cannot be processed for Italy compliance.
Invoice Navigator covers 98 FatturaPA 1.2.2 (SDI v1.9.1 effective May 15, 2026) rules for Italy.
How to Fix SDI-00311
Italy E-Invoicing Requirements
Phase
Status
Scope
B2G
Live (Jun 2014)
All public administration suppliers
B2B
Live (Jan 2019)
All domestic transactions
B2C
Live (Jan 2019)
All domestic transactions
Flat-rate taxpayers
Live (Jul 2022)
Extended to forfettari regime
Common Causes
- •Calculation rounding error
- •Wrong percentage applied
- •Base amount incorrect
Fix SDI-00311 automatically
Upload your invoice and let Invoice Navigator auto-remediate this error.