Until December 1st

VAT

• October 2025. Self-assessment 303

• October 2025. Group of companies, individual form: 322

• October 2025. Group of companies, aggregated form: 353

• October 2025. Operations assimilated to imports: 380

• Request for registration / cancellation. Monthly refund registry: 036

• Application for common deduction regime for differentiated sectors for 2026: without model

• SII . Waiver of electronic record keeping: 036

Environmental Taxes

• October 2025. Special tax on non-reusable plastic packaging. Presentation of accounting and inventory record book

• Year 2024. Tax on the value of electricity generation. Annual self-assessment: 583

• Year 2025: Tax on the value of electricity generation. Annual self-assessment for cessation of activity from January to October 2024: 588

Informative tax return for related-party transactions and transactions and situations related to countries or territories considered tax havens

• Year 2024: Companies whose tax period does not coincide with the calendar year: 232

  Rest of companies: within the month following the ten months subsequent to the end of the tax period.