Spanish VAT Return for Dolibarr

AEAT 303 for Dolibarr automates the preparation of the Spanish VAT self-assessment (Modelo 303) required by the Agencia Tributaria (AEAT). The module reads your
customer and supplier invoices, classifies operations by VAT rate and country,
detects investment goods from the accounting plan, and produces the official .303
flat file plus a PDF summary.

 

Key features

  • Automatic calculation of VAT charged and deductible VAT for any month or
  quarter.
  • Breakdown by VAT rate: 0 %, 4 %, 5 %, 7.5 %, 10 %, 21 % and equivalence
  surcharge.
  • Separate routing for investment goods (boxes 30/31, 34/35, 38/39).
  • Handles domestic, EU intra-community and non-EU operations.
  • On-screen preview simulating the official AEAT 303 form, including zero-amount
  boxes.
  • Download of the .303 file in AEAT layout (ISO-8859-1) for electronic filing.
  • PDF summary with final result: amount payable, refund request or zero result.
  • Result formulas follow AEAT 2026 instructions, including boxes 108, 109 and
  112.
  • Company name and VAT number read directly from Dolibarr company settings.

How it works

  1. Open Modelo 303 from the menu.
  2. Select year and period (month or quarter).
  3. Click Calculate to see the filled form.
  4. Download the .303 file or a PDF summary.

Supported boxes IVA devengado: 01/02, 04/05, 07/08, 10/11, 150/151/152,
153/154/155, 165/166/167, 16–27.
IVA deducible: 28/29 to 46.
Result: 64, 65, 66, 68, 69, 70, 71, 76, 77, 78, 87, 108, 109, 110, 112.
Additional info and volume: 59, 60, 61, 80, 83, 84, 88, 93–99, 125–128.

Limitations Does not auto-detect domestic reverse charge, simplified regime,
agriculture, used goods, travel agencies, cash basis, OSS/one-stop-shop or
differentiated deductions/prorrata. Manual configuration is required for these
cases.