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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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1796 Guides · 8 matching · 244 jurisdictions

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— researched and cited, not yet reviewed by a licensed practitioner.
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— reviewed as general reference material by a named licensed practitioner.
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International / Other · 8 Guides

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NameDomainJurisdictionStatus
Oecd Model Treaty Defaults

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

Cross-BorderInternational / OtherSource-cited draft

Showing 1–8 of 8 Guides

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1796 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.

International / Other

8 Guides

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Tax Residency Planning

Personal tax residency rules, the 183-day rule, digital nomad visas, e…

Tax OptimizationInternational / OtherSource-cited draft
Forex Controls

Foreign exchange controls and cross-border money movement rules by cou…

Cross-BorderInternational / OtherSource-cited draft
Cross Border Invoicing Compliance

Cross-border invoicing rules — which country's requirements apply, wha…

Cross-BorderInternational / OtherSource-cited draft
VAT Place Of Supply Master

The definitive place-of-supply reference for cross-border VAT on servi…

Cross-BorderInternational / OtherSource-cited draft
International Incorporation

International company formation and jurisdiction selection guide for s…

Company FormationInternational / OtherSource-cited draft
Cross Border VAT GST

VAT, GST, and sales tax compliance for international digital businesse…

VAT / GSTInternational / OtherSource-cited draft
Cross Border Payroll Coordination

Cross-border payroll compliance for companies with employees or contra…

Cross-BorderInternational / OtherSource-cited draft