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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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Japan Formation

Whenever asked about forming, incorporating, or registering a company …

Company FormationJapanSource-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

US Form 1120 C Corp

Tier 2 US federal content skill for preparing Form 1120 — the US C-cor…

—United StatesAttested by another accountant
North Macedonia Tax Optimization

Whenever asked about reducing tax in North Macedonia, tax planning, or…

Tax OptimizationNorth MacedoniaSource-cited draft
Ias32 Debt Vs Equity

IFRS classification of issued financial instruments as financial liabi…

—GLOBALSource-cited draft
MI Payroll

Tier 2 Michigan content skill for employer payroll compliance covering…

PayrollMichiganSource-cited draft
PT Return Assembly

Utilizar esta skill sempre que for solicitada a montagem, finalização …

Income TaxPortugalSource-cited draft
Bosnia and Herzegovina Income Tax -- Personal/Self-Employed

Whenever asked about Bosnia and Herzegovina personal income tax (porez…

Income TaxBosnia and HerzegovinaSource-cited draft
Tax Controversy Map Apa

Whenever a taxpayer faces a tax authority enquiry, audit, assessment, …

Cross-BorderGLOBALSource-cited draft
UK Return Assembly

Final orchestrator skill that assembles the complete UK filing package…

Income TaxUnited KingdomSource-cited draft
PH Sss Philhealth

Whenever asked about Philippine social security contributions for self…

PayrollPhilippinesAttested by another accountant
Ecuador Tax Optimization

Whenever asked about reducing tax in Ecuador, tax planning, or legal s…

Tax OptimizationEcuadorSource-cited draft
Ifrs15 Revenue

IFRS revenue recognition under IFRS 15 (Revenue from Contracts with Cu…

—GLOBALSource-cited draft
Bangladesh VAT

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

VAT / GSTBangladeshSource-cited draft
Tanzania Tax Optimization

Tanzania (Mainland) tax-optimization and statutory reliefs — CIT reduc…

Tax OptimizationTanzaniaAttested by another accountant
AT Income Tax

Whenever asked about Austrian income tax (Einkommensteuer) for self-em…

Income TaxAustriaSource-cited draft
France Bookkeeping

Whenever asked about bookkeeping, chart of accounts, Plan Comptable Gé…

BookkeepingFranceSource-cited draft
SAAS Digital Products

Whenever a SaaS company, digital platform, app developer, marketplace,…

—GLOBALSource-cited draft
Moldova Tax Optimization

Whenever asked about reducing tax in Moldova, tax planning, or legal s…

Tax OptimizationMoldovaSource-cited draft
Sweden Crypto Tax

Whenever asked about Sweden cryptocurrency or digital asset taxation. …

Crypto TaxSwedenSource-cited draft
Ukraine VAT

Whenever asked to prepare, review, or advise on a Ukraine VAT (PDV) re…

VAT / GSTUkraineSource-cited draft
PK Sales Tax ServicesVAT / GSTPakistanAttested by another accountant
EG Stamp Duty

Whenever asked about Egyptian stamp duty, document duty, or any tax-st…

—EgyptSource-cited draft
Bulgaria Corporate Income Tax

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

Income TaxBulgariaSource-cited draft
Canada Payroll

Whenever asked about Canadian payroll, source deductions, CPP contribu…

PayrollCanadaAttested by another accountant
Algeria Payroll

Whenever asked about Algeria payroll processing for employed persons. …

PayrollAlgeriaSource-cited draft
Brazil Payroll

Use esta skill sempre que perguntarem sobre processamento de folha de …

PayrollBrazilSource-cited draft
MN Income Tax

Whenever asked about Minnesota individual income tax for self-employed…

Income TaxMinnesotaSource-cited draft
DE Franchise Tax And LLC—DelawareSource-cited draft
New Zealand Crypto Tax

Whenever asked about New Zealand cryptocurrency or cryptoasset taxatio…

Crypto TaxNew ZealandSource-cited draft
IE Income Tax Form11

Whenever asked about Irish income tax for self-employed individuals fi…

Income TaxIrelandSource-cited draft
ES Autonomous Worker

Whenever asked about Spanish self-employed (autónomo) tax and social s…

Income TaxSpainSource-cited draft
US Pl 86 272 Income Tax Nexus

Tier 2 US federal content skill for Public Law 86-272 (15 USC §§381-38…

Income TaxUnited StatesSource-cited draft
NL Payroll Tax

Whenever asked about Dutch payroll taxes (loonheffingen) or the work c…

PayrollNetherlandsSource-cited draft
Côte d'Ivoire (Ivory Coast) Income Tax

Whenever asked about Côte d'Ivoire (Ivory Coast) personal income tax, …

Income TaxCôte d'IvoireSource-cited draft
ND Income Tax

Whenever asked about North Dakota individual income tax for self-emplo…

Income TaxNorth DakotaSource-cited draft
MA Income Tax

Whenever asked about Massachusetts individual income tax. Trigger on p…

Income TaxMassachusettsSource-cited draft
US PTE State Matrix

Tier 2 US federal-level reference skill providing the comprehensive st…

—United StatesSource-cited draft
MA Payroll

Tier 2 Massachusetts content skill for employer payroll compliance cov…

PayrollMassachusettsSource-cited draft
Pakistan Sales Tax

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

VAT / GSTPakistanSource-cited draft
SG Income Tax

Whenever asked about Singapore income tax for self-employed individual…

Income TaxSingaporeSource-cited draft
Tunisia Personal Income Tax

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

Income TaxTunisiaSource-cited draft
US Form 5472 Foreign Owned US

Tier 2 US federal content skill for Form 5472 — Information Return of …

—United StatesAttested by another accountant
Nepal Payroll

ALWAYS read this skill before touching any Nepal payroll work. Use whe…

PayrollNepalAttested by another accountant
Chile Tax Overview

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

Income TaxChileSource-cited draft
Uzbekistan Payroll

Whenever asked about Uzbekistan (the Republic of Uzbekistan — Oʻzbekis…

PayrollUzbekistanSource-cited draft
IL Freelancer Ops

When advising Israeli freelancers (עצמאים) on business operations, tax…

Income TaxIsraelSource-cited draft
Nepal Tds

ALWAYS read this skill before touching any Nepal TDS / withholding tax…

—NepalAttested by another accountant
FR Income Tax

Whenever asked about French income tax for self-employed individuals (…

Income TaxFranceSource-cited draft
Canada Financial Statements

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

Financial StatementsCanadaAttested by another accountant
KR Income Tax

Whenever asked about South Korean income tax for self-employed individ…

Income TaxSouth KoreaAttested by another accountant

United Kingdom

27 Guides · Reviewed by: James Power

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