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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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Azerbaijan Tax Optimization

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

Tax OptimizationAzerbaijanSource-cited draft

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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

ME Income Tax

Whenever asked about Maine individual income tax for self-employed per…

Income TaxMaineSource-cited draft
BR Simples Nacional

[PT-BR] Use esta skill sempre que for solicitado tratar do Simples Nac…

Income TaxBrazilAccountant-reviewed
UK Formation

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

Company FormationUnited KingdomAccountant-reviewed
Netherlands Crypto Tax

Whenever asked about Netherlands cryptocurrency or digital asset taxat…

Crypto TaxNetherlandsSource-cited draft
Peru Payroll

Whenever asked about Peru payroll processing for employed persons. Tri…

PayrollPeruAccountant-reviewed
NL Payroll Tax

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

PayrollNetherlandsSource-cited draft
Moldova (Republic of Moldova) Income Tax -- Self-Employed and Individuals

Whenever asked about Moldova (Republic of Moldova) personal income tax…

Income TaxMoldovaSource-cited draft
MX Estimated Tax

Whenever asked about Mexican provisional income tax payments (pagos pr…

Income TaxMexicoSource-cited draft
PA Sales Tax

Whenever asked about Pennsylvania sales and use tax, PA DOR filings, P…

VAT / GSTPennsylvaniaSource-cited draft
US Nonresident Cgt

US capital gains tax for non-resident aliens: FIRPTA withholding on US…

—US FederalSource-cited draft
AU Tax Residency

For any question about Australian tax residency. Trigger on: "am I an …

Cross-BorderAustraliaSource-cited draft
US Capital Gains

US federal capital gains tax for residents: short-term vs long-term ra…

Income TaxUS FederalSource-cited draft
Albania Personal Income Tax -- Self-Employed & Individuals

Whenever asked about Albania personal income tax for self-employed ind…

Income TaxAlbaniaSource-cited draft
Mauritania Personal Income Tax

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

Income TaxMauritaniaSource-cited draft
North Macedonia Compulsory Social Contributions & Payroll

Whenever asked about North Macedonia (Republic of North Macedonia, MK)…

PayrollNorth MacedoniaSource-cited draft
MT Capital Gains

For any question about capital gains tax in Malta. Trigger on: "CGT Ma…

Income TaxMaltaSource-cited draft
Kenya Company Formation & Entity Choice

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

Company FormationKenyaSource-cited draft
Costa Rica Payroll Skill v0.1 (Tier 2 — research-verified, pending accountant sign-off)

Whenever asked about Costa Rica payroll processing for employed person…

PayrollCosta RicaSource-cited draft
Bhutan Tax Overview

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

Income TaxBhutanSource-cited draft
Croatia Payroll

Whenever asked about Croatia payroll processing for employed persons. …

PayrollCroatiaSource-cited draft
Bosnia and Herzegovina Payroll

Whenever asked about Bosnia and Herzegovina payroll processing for emp…

PayrollBosnia and HerzegovinaSource-cited draft
Seychelles Corporate Income Tax

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

Income TaxSeychellesSource-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
CA Fed T1135

Whenever asked about Canada Form T1135, Foreign Income Verification St…

Cross-BorderCanadaAccountant-reviewed
Bulgaria Payroll

Whenever asked about Bulgaria payroll processing for employed persons.…

PayrollBulgariaSource-cited draft
Albania Payroll Skill v0.1 (Tier 2 — research-verified, reviewer sign-off pending)

Whenever asked about Albania payroll processing for employed persons. …

PayrollAlbaniaSource-cited draft
SG Tax Residency

For any question about Singapore tax residency. Trigger on: "Singapore…

Cross-BorderSingaporeSource-cited draft
Armenia Social Contributions & Payroll Withholding

Whenever asked about Armenia payroll social contributions and personal…

PayrollArmeniaSource-cited draft
JP Return Assembly

Final orchestrator skill that assembles the complete Japanese filing p…

Income TaxJapanSource-cited draft
Azerbaijan Income Tax -- Individuals & Self-Employed

Whenever asked about Azerbaijan personal income tax for individuals, e…

Income TaxAzerbaijanSource-cited draft
Latvia Payroll

Whenever asked about Latvia payroll processing for employed persons. T…

PayrollLatviaSource-cited draft
Moldova Social Contributions, Health Insurance & Personal Income Tax

Whenever asked about Moldova payroll social contributions, health insu…

PayrollMoldovaSource-cited draft
Madagascar Tax Overview

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

Income TaxMadagascarSource-cited draft
Netherlands Tax Optimization

Whenever asked about reducing tax in the Netherlands, tax planning, sa…

Tax OptimizationNetherlandsSource-cited draft
Mauritania Corporate Income Tax

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

Income TaxMauritaniaSource-cited draft
UK Non Dom

For any question about UK non-dom rules. Trigger on: "UK non-dom", "UK…

—United KingdomSource-cited draft
Tanzania Income Tax -- Personal / Self-Employed

Whenever asked about Tanzania (Mainland) personal income tax, PAYE, or…

—TanzaniaAccountant-reviewed
Inheritance Estate Gift Matrix

Whenever an executor, donor, donee, or beneficiary asks about inherita…

Cross-BorderGLOBALSource-cited draft
NY Estimated Tax

Whenever asked about New York State estimated tax (Form IT-2105) for s…

Income TaxNew YorkSource-cited draft
Morocco Payroll

Whenever asked about Morocco payroll for a self-employed person who HI…

PayrollMoroccoSource-cited draft
Dominican Republic Social Security Contributions (SDSS / TSS)

Whenever asked about Dominican Republic social-security contributions …

PayrollDominican RepublicSource-cited draft
PK Formation

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

Company FormationPakistanAccountant-reviewed
NL 30 Percent Ruling

Netherlands 30% ruling (tax-free allowance for inbound expats): 30% of…

—NetherlandsSource-cited draft
United Arab Emirates Company Formation & Entity Choice

Source-cited draft: company formation & entity choice for United Arab …

Company FormationUnited Arab EmiratesSource-cited draft
Burkina Faso VAT (TVA)

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

VAT / GSTBurkina FasoSource-cited draft
NZ Tax Residency

New Zealand tax residency: 183-day test, permanent place of abode, cea…

Cross-BorderNew ZealandSource-cited draft
Burkina Faso Income Tax (IBICA / IBNC)

For Burkina Faso personal/business income tax for a self-employed pers…

Income TaxBurkina FasoSource-cited draft
Burkina Faso Payroll (IUTS & TPA)

For Burkina Faso payroll for an employer — computing IUTS (Impôt Uniqu…

PayrollBurkina FasoSource-cited draft
Burkina Faso Tax Optimization

For legitimate (legal) tax optimization for a self-employed person, fr…

Tax OptimizationBurkina FasoSource-cited draft

Dominican Republic

22 Guides · Partner: Miguel Lantigua

Guides awaiting reviewBecome a Partner