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© 2026 OpenAccountants. Open tax rules, reviewed by accountants.

OpenAccountants publishes open, source-cited tax knowledge for use by people, software and AI. Automated outputs are drafts and do not create a professional engagement. Obtain qualified advice before filing, paying or taking a material tax position.

The open Tax Guides

Open Tax Guides for the AI you already use

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Browse the open Tax Guides that power OpenAccountants workflows. Each Guide is designed to be cited, inspectable, and usable by AI systems (as a machine-readable Skill). Some are source-cited drafts. Some have named accountant review. All are open Tax Guides.

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

1810 Guides · 244 jurisdictions

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Namibia Company Formation & Entity Choice

Source-cited draft: company formation & entity choice for Namibia (tax…

Company FormationNamibiaSource-cited draft

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1810 Guides across 244 jurisdictions. You do not need to cover an entire country. Publish a Guide within your expertise, under your name, and colleagues attest to the ones they stand behind.

GLOBAL

61 Guides · No accountant yet

United States

60 Guides · No accountant yet

Australia

23 Guides · No accountant yet

Spain

22 Guides · No accountant yet

Canada

35 Guides · Reviewed by: Edgar Lautsyus

Hong Kong Tax

Whenever asked about Hong Kong taxation, whether VAT/GST/sales tax exi…

Income TaxHong KongSource-cited draft
Chile Corporate Income Tax

Source-cited draft: corporate income tax for Chile (tax year 2025) — r…

Income TaxChileSource-cited draft
Moldova VAT

Whenever asked to prepare, review, or classify transactions for a Mold…

VAT / GSTMoldovaSource-cited draft
Brunei Payroll & Social Contributions

Source-cited draft: payroll & social contributions for Brunei (tax yea…

PayrollBruneiSource-cited draft
MS Income Tax

Whenever asked about Mississippi individual income tax for self-employ…

Income TaxMississippiSource-cited draft
Oecd Model Treaty Defaults

OECD Model Tax Convention default provisions for cross-border tax allo…

Cross-BorderInternational / OtherSource-cited draft
Germany Bookkeeping

Whenever asked about bookkeeping, chart of accounts, Kontenrahmen, SKR…

BookkeepingGermanySource-cited draft
Iraq Corporate Income Tax

Source-cited draft: corporate income tax for Iraq (tax year 2025) — ra…

Income TaxIraqSource-cited draft
DE Return Assembly

Final orchestrator skill that assembles the complete German filing pac…

Income TaxGermanySource-cited draft
Uzbekistan Tax Optimization

Whenever asked about reducing tax in Uzbekistan, tax planning, or lega…

Tax OptimizationUzbekistanSource-cited draft
MN Sales Tax

Whenever asked about Minnesota sales and use tax. Trigger on phrases l…

VAT / GSTMinnesotaSource-cited draft
MN Corporate And PTE—MinnesotaSource-cited draft
MA Tax Optimization

Whenever asked about legitimate (legal) tax optimization for a self-em…

Tax OptimizationMoroccoSource-cited draft
Malaysia Einvoice

Whenever asked about Malaysia e-invoicing, MyInvois system, LHDN/LHDNM…

E-InvoicingMalaysiaSource-cited draft
NY Payroll

Tier 2 New York content skill for employer payroll compliance covering…

PayrollNew YorkSource-cited draft
NZ Acc Levies

Whenever asked about New Zealand ACC levies for self-employed individu…

PayrollNew ZealandSource-cited draft
Non-resident rental income tax on Kenyan property

Non-resident rental income tax on Kenyan property: a guide for foreign…

Corporate TaxKenyaSource-cited draft
Netherlands — Owner-Occupied Home Tax Scheme

The Dutch owner-occupied home scheme

Income TaxNetherlandsSource-cited draft
Slovenia VAT Return

Whenever asked to prepare, review, or create a Slovenian VAT return (D…

VAT / GSTSloveniaSource-cited draft
Mongolia Corporate Income Tax

Source-cited draft: corporate income tax for Mongolia (tax year 2025) …

Income TaxMongoliaSource-cited draft
Mongolia Tax Overview

Source-cited draft: tax overview for Mongolia (tax year 2025) — rates,…

Income TaxMongoliaSource-cited draft
Honduras Payroll

Whenever asked about Honduras payroll processing for employed persons.…

PayrollHondurasSource-cited draft
TW Income Tax

Whenever asked about Taiwan individual income tax. Trigger on phrases …

Income TaxTaiwanSource-cited draft
CO VAT Return

Colombian VAT return (IVA -- Impuesto sobre las Ventas) for self-emplo…

VAT / GSTColombiaSource-cited draft
Permanent Establishment Risk

Whenever a freelancer or small business has cross-border activity that…

Cross-BorderGLOBALSource-cited draft
Taxes and Small Businesses in Nigeria: A Simple Guide

Nigeria has a new tax law. It is called the Nigeria Tax Act 2025. It s…

Income TaxNigeriaSource-cited draft
Mongolia Payroll & Social Contributions

Source-cited draft: payroll & social contributions for Mongolia (tax y…

PayrollMongoliaSource-cited draft
Azerbaijan Payroll

Whenever asked about Azerbaijan payroll processing for employed person…

PayrollAzerbaijanSource-cited draft
Turkmenistan Corporate Income Tax

Source-cited draft: corporate income tax for Turkmenistan (tax year 20…

Income TaxTurkmenistanSource-cited draft
GA Sales Tax

Whenever asked about Georgia sales and use tax. Trigger on phrases lik…

VAT / GSTGeorgia (US)Source-cited draft
Export declaration requirement for imported goods

Export declaration requirement for imported goods: a guide for importe…

Corporate TaxKenyaSource-cited draft
Ohio Sales Tax

Whenever asked about Ohio sales and use tax, ODT filings, Ohio CAT, Oh…

VAT / GSTOhioSource-cited draft
Kuwait Tax

Whenever asked about Kuwait taxation, corporate income tax, ZAKAT, or …

Income TaxKuwaitSource-cited draft
PL Capital Gains

Poland capital gains tax: 19% Belka tax on investment income, no holdi…

Income TaxPolandSource-cited draft
Zambia Tax Overview

Source-cited draft: tax overview for Zambia (tax year 2025) — rates, t…

Income TaxZambiaSource-cited draft
NZ Provisional Tax

Whenever asked about New Zealand provisional tax for individuals, comp…

Income TaxNew ZealandSource-cited draft
EG Sme Tax

Whenever asked about Egypt's simplified or SME tax regime for small se…

Income TaxEgyptSource-cited draft
Brazil Einvoice

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

E-InvoicingBrazilAttested by another accountant
Armenia Payroll

Whenever asked about Armenia (Republic of Armenia — Hayastan, South Ca…

PayrollArmeniaSource-cited draft
Paraguay Personal Income Tax (IRP) -- Self-Employed

Whenever asked about Paraguay personal income tax (IRP) for self-emplo…

Income TaxParaguaySource-cited draft
IE Payroll

Whenever asked to compute, review, or advise on end-to-end Irish month…

PayrollIrelandSource-cited draft
Montenegro Social Security Contributions & Salary Tax

Whenever asked about Montenegro social security contributions and payr…

PayrollMontenegroSource-cited draft
MA Bookkeeping

Whenever asked about record-keeping, bookkeeping, or invoicing obligat…

BookkeepingMoroccoSource-cited draft
CA Estimated Tax 540es

Tier 2 California content skill for computing California estimated tax…

Income TaxCaliforniaSource-cited draft
Mozambique Payroll

Whenever asked about Mozambique payroll processing for employed person…

PayrollMozambiqueSource-cited draft
Ecuador Company Formation & Entity Choice

Source-cited draft: company formation & entity choice for Ecuador (tax…

Company FormationEcuadorSource-cited draft
Armenia VAT

Whenever asked to prepare, review, or classify transactions for an Arm…

VAT / GSTArmeniaSource-cited draft
Dominican Republic Corporate Income Tax

Source-cited draft: corporate income tax for Dominican Republic (tax y…

Income TaxDominican RepublicSource-cited draft
Global Payment Processors

Classification rules for payment processor transactions — the number o…

—GLOBALSource-cited draft

United Kingdom

27 Guides · Reviewed by: James Power

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