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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.

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1810 Guides · 244 jurisdictions

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NameDomainJurisdictionStatus
Ifrs16 Leases

IFRS lease accounting under IFRS 16 (Leases). Covers the lessee single…

—GLOBALSource-cited draft
Latvia Company Formation & Entity Choice

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

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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

Company Formation
Latvia
Source-cited draft
US Major Partners—GLOBALSource-cited draft
NL Zzp Deductions

Whenever asked about Dutch self-employed (zzp) tax deductions. Trigger…

Income TaxNetherlandsSource-cited draft
Asia Pacific CorridorsCross-BorderGLOBALSource-cited draft
Americas CorridorsCross-BorderGLOBALSource-cited draft
US Ca Return Assembly

Final orchestrator skill that assembles the complete federal and Calif…

Income TaxCaliforniaSource-cited draft
UK Major Partners—GLOBALSource-cited draft
EU Intra Rates—GLOBALSource-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
Côte d'Ivoire (Ivory Coast) Social Contributions (CNPS) -- Employer & Employee

Whenever asked about Côte d'Ivoire (Ivory Coast) social security contr…

PayrollCôte d'IvoireSource-cited draft
Croatia Social Security Contributions (Doprinosi) -- Employment

Whenever asked about Croatian social security contributions (doprinosi…

PayrollCroatiaSource-cited draft
Azerbaijan Corporate Income Tax

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

Income TaxAzerbaijanSource-cited draft
Colombia Company Formation & Entity Choice

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

Company FormationColombiaSource-cited draft
Serbia Tax Optimization

Whenever asked about reducing tax in Serbia, tax planning, or legal st…

Tax OptimizationSerbiaSource-cited draft
Cyprus VAT Return

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

VAT / GSTCyprusAttested by another accountant
Israel VAT

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

VAT / GSTIsraelSource-cited draft
Azerbaijan Company Formation & Entity Choice

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

Company FormationAzerbaijanSource-cited draft
Dominican Republic Special Tax Regimes (Free Zones, Tourism, Renewables)

Dominican Republic Special Tax Regimes (Free Zones, Tourism, Renewable…

Tax OptimizationDominican RepublicAttested by another accountant
Dominican Republic Tax Registration & Formal Obligations (RNC)

Dominican Republic Tax Registration & Formal Obligations (RNC) — accou…

Company FormationDominican RepublicSource-cited draft
US Sole Prop Bookkeeping

Tier 2 content skill for classifying business transactions into US fed…

BookkeepingUnited StatesAttested by another accountant
Azerbaijan Tax Overview

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

Income TaxAzerbaijanSource-cited draft
Utah Sales Tax

Whenever asked about Utah sales tax, Utah use tax, USTC sales tax fili…

VAT / GSTUtahSource-cited draft
Bosnia and Herzegovina Social Security Contributions & Payroll

Whenever asked about Bosnia and Herzegovina (BiH) payroll social secur…

PayrollBosnia and HerzegovinaSource-cited draft
US Tax Workflow Base

Tier 1 workflow base for US federal income tax skills serving sole pro…

Income TaxUnited StatesSource-cited draft
NU Individual Return

Whenever asked about Nunavut territorial income tax for a self-employe…

Income TaxCanadaSource-cited draft
SE Social Contributions

Whenever asked about Swedish self-employed social contributions (egena…

PayrollSwedenSource-cited draft
ME Sales Tax

Whenever asked about Maine sales and use tax. Trigger on phrases like …

VAT / GSTMaineSource-cited draft
Zimbabwe Company Formation & Entity Choice

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

Company FormationZimbabweSource-cited draft
NE Sales Tax

Whenever asked about Nebraska sales and use tax. Trigger on phrases li…

VAT / GSTNebraskaSource-cited draft
Belarus Company Formation & Entity Choice

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

Company FormationBelarusSource-cited draft
Nigeria VAT

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

VAT / GSTNigeriaSource-cited draft
Dominican Republic Withholding Taxes (Retenciones, Dividends, Foreign Payments)

Dominican Republic Withholding Taxes (Retenciones, Dividends, Foreign …

Income TaxDominican RepublicAttested by another accountant
HK Salaries Tax

Whenever asked about Hong Kong salaries tax. Trigger on phrases like "…

Income TaxHong KongSource-cited draft
Uganda VAT

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

VAT / GSTUgandaSource-cited draft
Spain Financial Statements

When preparing, reviewing, or advising on annual financial statements …

Financial StatementsSpainSource-cited draft
Dominican Republic Tax Defense & Penalties

Dominican Republic Tax Defense & Penalties — accountant-verified rules…

ReferencesDominican RepublicAttested by another accountant
Mississippi Sales Tax

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

VAT / GSTMississippiSource-cited draft
Dominican Republic Simplified Tax Regimes (RST)

Dominican Republic Simplified Tax Regimes (RST) — accountant-verified …

Income TaxDominican RepublicAttested by another accountant
TX Sales Use Tax

Texas Sales and Use Tax return (Form 01-114) for self-employed individ…

Income TaxTexasSource-cited draft
Jamaica Personal Income Tax

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

Income TaxJamaicaSource-cited draft
Dominican Republic Donations & Estates

Dominican Republic Donations & Estates — accountant-verified rules fro…

Estate & Wealth TaxDominican RepublicAttested by another accountant
Indiana Sales Tax

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

VAT / GSTIndianaSource-cited draft
Maine Sales Tax

Whenever asked about Maine sales and use tax. Trigger on phrases like …

VAT / GSTMassachusettsSource-cited draft
Financial Reporting Workflow Base

Foundation workflow base for financial-reporting (US GAAP and IFRS) co…

Income TaxGLOBALSource-cited draft
Dominican Republic Municipal & Environmental Levies

Dominican Republic Municipal & Environmental Levies — accountant-verif…

Sector GuidanceDominican RepublicAttested by another accountant
Peru Social Security, Health & Payroll Contributions

Whenever asked about Peru payroll contributions, social security, heal…

PayrollPeruAttested by another accountant
IL Estimated Tax

Illinois Estimated Income Tax (Form IL-1040-ES) for self-employed indi…

Income TaxIllinoisAttested by another accountant
Bermuda Tax

Whenever asked about Bermuda taxation, payroll tax, customs duties, or…

Income TaxBermudaSource-cited draft
Dominican Republic Transfer Pricing

Dominican Republic Transfer Pricing — accountant-verified rules from t…

Transfer PricingDominican RepublicAttested by another accountant

United Kingdom

27 Guides · Reviewed by: James Power

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