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taxdown Codex Plugin

Author
TAXDOWN S.L.
Category
Finance
Topics
Sales, Marketing & Business Ops · Payments & Fintech
Version
1.0.3
First seen
2026-07-12
Last confirmed
2026-07-13
Explanation last updated
2026-07-12

The explanation below is AI-generated. Please verify it against the sources.

TaxDown is a Finance-category plugin, made by TAXDOWN S.L., that helps users in Spain resolve tax questions for both individuals and self-employed workers (autónomos), covering topics such as deductions, IRPF, and the annual income tax return (declaración de la renta), according to the plugin manifest. Its homepage describes an online service that connects to Spain's Agencia Tributaria (AEAT) as an official 'Colaborador Social', uses an AI tool called Luz to detect deductions, and has certified tax advisors review each return before filing. The plugin's specific in-app capabilities list is empty, and the default prompt suggests it is used to 'summarize the relevant Taxdown status or guidance'. According to the homepage, TaxDown has processed more than 2,000,000 tax returns and holds a 4.7/5 rating from about 32,000 reviews on the App Store and Google Play. Filing plans reportedly start at 35€, with a free plan available for estimating a refund.

Overview

According to its homepage, TaxDown is a Spanish online tax-filing service for individuals and self-employed workers (autónomos), investors, property owners, and foreign residents. It combines an AI system ('Luz') that analyzes data pulled directly from the Agencia Tributaria with review by certified human tax advisors before a return is submitted. The service offers a free plan for estimating a refund and paid plans (starting at 35€, per the homepage) for actually filing the return, and Premium plans reportedly include defense support if Hacienda later requests more information.

What you can do with taxdown

  • Get answers to Spanish tax questions covering deductions, IRPF, renta, and tax obligations for individuals and autónomos (per plugin description)
  • Calculate an estimated tax refund for free in under 30 seconds, based on salary, region, family situation, pension plan, and mortgage inputs (per homepage)
  • File the annual income tax return (declaración de la renta) through plans homepage says start at 35€, varying by situation (asalariado, propietario, autónomo, inversor)
  • Connect securely to the Agencia Tributaria (AEAT) via Cl@ve as a registered 'Colaborador Social', without sharing your password (per homepage)
  • Have an AI tool ('Luz') apply over 150 regional and national deductions and cross-check them against your official draft (borrador) (per homepage)
  • Get your return reviewed by a certified tax advisor before it is filed, with chat/email/phone support and, on Premium plans, defense if Hacienda later sends a requerimiento (per homepage)
  • Get guidance specific to autónomos, investors (stocks/crypto), property owners with rentals, and foreign residents/non-residents (per homepage)
  • Detailed technical capabilities of the plugin itself for use inside an assistant are unknown, since the manifest's capabilities list is empty

Sources

Original description (English)

TaxDown te ayuda a resolver dudas fiscales en España, tanto para particulares como autónomos: deducciones,...

History of taxdown

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