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AI makes tax knowledge abundant. OpenAccountants makes tax work trustworthy.

Open tax rules, trusted AI workflows, and named accountant review where available.

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OpenAccountants provides general tax and accounting reference material and AI-assisted working-paper tools. It is not tax, legal, accounting, or financial advice. Outputs must be reviewed by a qualified professional before filing, payment, or action.

OpenAccountants provides general tax and accounting reference material and AI-assisted working-paper tools. It is not tax, legal, accounting, or financial advice. Outputs must be reviewed by a qualified professional before filing, payment, or action.

© 2026 OpenAccountants. All rights reserved.

The open rules layer

Open tax rules for AI workflows

Browse the open tax and accounting skills that power OpenAccountants workflows. Each skill is designed to be cited, inspectable, machine-readable, and usable by AI agents. Some are source-cited drafts. Some have named accountant review. All are part of the open rules layer.

The rules are open. The trust layer shows who reviewed them.

1754 skills · 22 matching · 242 jurisdictions

Source-cited draft
— researched and cited, not yet reviewed by a licensed practitioner.
Accountant-reviewed
— reviewed as general reference material by a named licensed practitioner.
Needs update
— flagged for review.
Deprecated
— do not use for current work.
NameDomainJurisdictionStatus
poland-einvoice

Use this skill whenever asked about Polish e-invoicing, KSeF, Krajowy …

E-InvoicingPolandSource-cited draft

Showing 1–22 of 22 skills

Licensed accountant? Help build your country's tax rules.

1754 open skills across 242 jurisdictions. Verified by a licensed accountant in 20 countries. Download your country's workbook, review in Excel, get named on the site and in our MCP integrations.

20 jurisdictions with a lead verifier · 222 open for contributors

GLOBAL

36 skills · Looking for contributors

Australia

14 skills · Looking for contributors

Germany

11 skills · Looking for contributors

Japan

10 skills · Looking for contributors

US Federal

22 skills · Lead: Amir Pelinkovic · 9 verified

belgium-einvoice

Use this skill whenever asked about e-invoicing in Belgium, Peppol B2B…

E-InvoicingBelgiumSource-cited draft
mexico-einvoice

Use this skill whenever asked about Mexico e-invoicing, CFDI (Comproba…

E-InvoicingMexicoSource-cited draft
ma-einvoice

Use this skill whenever asked about Morocco e-invoicing, the DGI's man…

E-InvoicingMoroccoSource-cited draft
ua-einvoice

Use this skill whenever asked about Ukrainian electronic invoicing and…

E-InvoicingUkraineSource-cited draft
portugal-einvoice

Utilize esta skill sempre que lhe forem colocadas questões sobre factu…

E-InvoicingPortugalAccountant-verified
spain-einvoice

Use this skill whenever asked about Spanish e-invoicing, factura elect…

E-InvoicingSpainSource-cited draft
hungary-einvoice

Use this skill whenever asked about e-invoicing in Hungary, NAV Online…

E-InvoicingHungarySource-cited draft
mx-cfdi

Use this skill whenever asked about Mexican CFDI electronic invoicing.…

E-InvoicingMexicoSource-cited draft
saudi-einvoice

Use this skill whenever asked about Saudi Arabia e-invoicing, ZATCA FA…

E-InvoicingSaudi Arabia8/12 facts verified
india-einvoice

Use this skill whenever asked about India GST e-invoicing, Invoice Reg…

E-InvoicingIndiaAccountant-verified
malaysia-einvoice

Use this skill whenever asked about Malaysia e-invoicing, MyInvois sys…

E-InvoicingMalaysiaSource-cited draft
romania-einvoice

Use this skill whenever asked about e-invoicing in Romania, RO e-Factu…

E-InvoicingRomaniaSource-cited draft
jp-etax-filing

Use this skill whenever asked about filing a Japanese tax return elect…

E-InvoicingJapanSource-cited draft
italy-einvoice

Use this skill whenever asked about Italian e-invoicing, FatturaPA, Si…

E-InvoicingItalySource-cited draft
ru-einvoice

Use this skill whenever asked about Russian electronic invoicing or di…

E-InvoicingRussiaSource-cited draft
greece-einvoice

Use this skill whenever asked about e-invoicing in Greece, myDATA plat…

E-InvoicingGreeceSource-cited draft
germany-einvoice

Use this skill whenever asked about German e-invoicing, XRechnung, ZUG…

E-InvoicingGermanySource-cited draft
brazil-einvoice

Use esta skill sempre que for questionado sobre nota fiscal eletrônica…

E-InvoicingBrazilAccountant-verified
france-einvoice

Use this skill whenever asked about French e-invoicing, facturation él…

E-InvoicingFranceSource-cited draft
id-einvoice-coretax

Use this skill whenever asked about filing, invoicing, or submitting a…

E-InvoicingIndonesiaAccountant-verified
cn-fapiao-einvoice

当被问及任何中国发票管理、增值税专用发票、增值税普通发票、数电发票(全面数字化的电子发票)、数字化电子发票、金税四期、电子税务局开票、发票真…

E-InvoicingChinaSource-cited draft

Canada

17 skills · Lead: Edgar Lautsyus · 11 verified

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