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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.

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

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.

1752 Guides · 241 jurisdictions

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— researched and cited, not yet reviewed by a licensed practitioner.
Accountant-reviewed
— reviewed as general reference material by a named licensed practitioner.
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— flagged for review.
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— do not use for current work.
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IN Professional Tax

Whenever asked about Indian professional tax (profession tax). Trigger…

Income TaxIndiaAccountant-reviewed

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1752 Guides across 241 jurisdictions. You do not need to review an entire country — choose a Guide within your expertise and get credited as an Open Accountants Partner on the ones you review.

GLOBAL

61 Guides · Awaiting review

US Federal

58 Guides · Awaiting review

Spain

22 Guides · Awaiting review

Australia

20 Guides · Awaiting review

Canada

35 Guides · Partner: Edgar Lautsyus

Rwanda Personal Income Tax

Source-cited draft: personal income tax for Rwanda (tax year 2025) — r…

Income TaxRwandaSource-cited draft
Qatar VAT / GST

Source-cited draft: vat / gst for Qatar (tax year 2025) — rates, thres…

VAT / GSTQatarSource-cited draft
Vietnam Tax Overview

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

Income TaxVietnamSource-cited draft
Peru Corporate Income Tax

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

Income TaxPeruSource-cited draft
UK Rental Sa105

Whenever asked about UK property income or rental income for individua…

Income TaxUnited KingdomAccountant-reviewed
Trinidad and Tobago Payroll & Social Contributions

Source-cited draft: payroll & social contributions for Trinidad and To…

PayrollTrinidad and TobagoSource-cited draft
Uruguay Corporate Income Tax

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

Income TaxUruguaySource-cited draft
Taiwan Company Formation & Entity Choice

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

Company FormationTaiwanSource-cited draft
British Virgin Islands Payroll & Social Contributions

Source-cited draft: payroll & social contributions for British Virgin …

PayrollBritish Virgin IslandsSource-cited draft
Oman Corporate Income Tax

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

Income TaxOmanSource-cited draft
Uzbekistan Company Formation & Entity Choice

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

Company FormationUzbekistanSource-cited draft
MX Cfdi

Whenever asked about Mexican CFDI electronic invoicing. Trigger on phr…

E-InvoicingMexicoSource-cited draft
Peru Company Formation & Entity Choice

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

Company FormationPeruSource-cited draft
British Virgin Islands Tax Overview

Source-cited draft: tax overview for British Virgin Islands (tax year …

Income TaxBritish Virgin IslandsSource-cited draft
Burkina Faso Social Security (CNSS)

For Burkina Faso CNSS social-security contributions — three branches (…

PayrollBurkina FasoSource-cited draft
Uruguay Company Formation & Entity Choice

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

Company FormationUruguaySource-cited draft
Vietnam Corporate Income Tax

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

Income TaxVietnamSource-cited draft
Iraq Company Formation & Entity Choice

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

Company FormationIraqSource-cited draft
Trinidad and Tobago Company Formation & Entity Choice

Source-cited draft: company formation & entity choice for Trinidad and…

Company FormationTrinidad and TobagoSource-cited draft
Ukraine Tax Overview

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

Income TaxUkraineSource-cited draft
Papua New Guinea Payroll & Social Contributions

Source-cited draft: payroll & social contributions for Papua New Guine…

PayrollPapua New GuineaSource-cited draft
Uzbekistan Tax Overview

Source-cited draft: tax overview for Uzbekistan (tax year 2025) — rate…

Income TaxUzbekistanSource-cited draft
Papua New Guinea Tax Overview

Source-cited draft: tax overview for Papua New Guinea (tax year 2025) …

Income TaxPapua New GuineaSource-cited draft
Taiwan Tax Overview

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

Income TaxTaiwanSource-cited draft
Oman Company Formation & Entity Choice

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

Company FormationOmanSource-cited draft
British Virgin Islands Corporate Income Tax

Source-cited draft: corporate income tax for British Virgin Islands (t…

Income TaxBritish Virgin IslandsSource-cited draft
Zimbabwe Corporate Income Tax

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

Income TaxZimbabweSource-cited draft
Norway Tax Overview

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

Income TaxNorwaySource-cited draft
Ukraine Corporate Income Tax

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

Income TaxUkraineSource-cited draft
Slovakia Corporate Income Tax

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

Income TaxSlovakiaSource-cited draft
Papua New Guinea Company Formation & Entity Choice

Source-cited draft: company formation & entity choice for Papua New Gu…

Company FormationPapua New GuineaSource-cited draft
Slovenia Tax Overview

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

Income TaxSloveniaSource-cited draft
Thailand Payroll & Social Contributions

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

PayrollThailandSource-cited draft
Armenia Personal Income Tax -- Self-Employed & Individuals

Whenever asked about Armenian personal income tax for individuals, sel…

Income TaxArmeniaSource-cited draft
CH Cantonal Tax

Whenever asked about Swiss cantonal and communal income tax (Staatsste…

Income TaxSwitzerlandSource-cited draft
Senegal Corporate Income Tax

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

Income TaxSenegalSource-cited draft
Honduras Isv

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

—HondurasSource-cited draft
Romania Payroll & Social Contributions

Source-cited draft: payroll & social contributions for Romania (tax ye…

PayrollRomaniaSource-cited draft
GR VAT Return

Redirect — consolidated into greece-vat-return.md in this directory.

VAT / GSTGreeceSource-cited draft
UK Freelance Intake

When a user asks for help preparing their UK tax returns AND mentions …

Income TaxUnited KingdomSource-cited draft
PH Sss Philhealth

Whenever asked about Philippine social security contributions for self…

PayrollPhilippinesAccountant-reviewed
Qatar Payroll & Social Contributions

Source-cited draft: payroll & social contributions for Qatar (tax year…

PayrollQatarSource-cited draft
Estonia Tax Overview

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

Income TaxEstoniaSource-cited draft
Rwanda Corporate Income Tax

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

Income TaxRwandaSource-cited draft
IN GST Return

This skill has been consolidated. See india-gst.md in this directory.

VAT / GSTIndiaAccountant-reviewed
IL Income Tax

Illinois Individual Income Tax Return (Form IL-1040) for sole propriet…

Income TaxIllinoisAccountant-reviewed
Myanmar Personal Income Tax

Source-cited draft: personal income tax for Myanmar (tax year 2025) — …

Income TaxMyanmarSource-cited draft
WA Business Occupation Tax

Washington State Business and Occupation (B&O) Tax for self-employed i…

Income TaxWashingtonSource-cited draft
Rwanda Company Formation & Entity Choice

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

Company FormationRwandaSource-cited draft

Dominican Republic

22 Guides · Partner: Miguel Lantigua

Guides awaiting reviewBecome a Partner