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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 rules layer

Open tax rules for the AI you already use

Browse the open tax and accounting skills that power OpenAccountants workflows. Each skill is designed to be cited, inspectable, machine-readable, and usable by AI agents. Some are source-cited drafts. Some have named accountant review. All are part of the open rules layer.

The rules are open. The trust layer shows who reviewed them.

1752 skills · 74 matching · 242 jurisdictions

Source-cited draft
— researched and cited, not yet reviewed by a licensed practitioner.
Accountant-reviewed
— reviewed as general reference material by a named licensed practitioner.
Needs update
— flagged for review.
Deprecated
— do not use for current work.
NameDomainJurisdictionStatus
no-sales-tax-states

Asked about states with no sales tax, Alaska local sales tax, Delaware…

VAT / GSTUS FederalAccountant-reviewed

Showing 51–74 of 74 skills

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Know this subject? Review one defined task.

1752 open rules across 242 jurisdictions. You do not need to review an entire country — choose a focused issue within your expertise and receive attribution to the exact accepted change.

GLOBAL

36 rules · Needs review

Australia

14 rules · Needs review

Germany

13 rules · Needs review

Spain

10 rules · Needs review

US Federal

22 rules · Maintained by Amir Pelinkovic

br-income-tax

Use esta skill sempre que for solicitado sobre o imposto de renda bras…

Income TaxBrazilAccountant-reviewed
pk-income-tax

Asked about Pakistan personal income tax for resident individuals, sel…

Income TaxPakistanAccountant-reviewed
us-self-employed-retirement

Tier 2 content skill for computing the self-employed retirement contri…

Income TaxUS FederalAccountant-reviewed
Florida Discretionary Sales Surtax — by County (2026)

Florida discretionary sales surtax rates for all 67 counties (CY2026, …

VAT / GSTFloridaAccountant-reviewed
Florida Transient Rental Tax (Tourist Development) — by County

Florida local-option transient rental (tourist development) tax rates …

VAT / GSTFloridaAccountant-reviewed
sri-lanka-corporate-tax

ALWAYS read this skill before touching any Sri Lanka corporate income …

Income TaxSri LankaAccountant-reviewed
portugal-crypto-tax

Utilize esta skill sempre que for solicitada informação sobre a tribut…

Crypto TaxPortugalAccountant-reviewed
tanzania-tax-optimization

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

Tax OptimizationTanzaniaAccountant-reviewed
tanzania-withholding-tax

Tanzania (Mainland) withholding tax — resident and non-resident WHT ra…

Cross-BorderTanzaniaAccountant-reviewed
brazil-crypto-tax

Asked about Brazil cryptocurrency or digital asset taxation / Use esta…

Crypto TaxBrazilAccountant-reviewed
id-einvoice-coretax

Asked about filing, invoicing, or submitting any Indonesian tax obliga…

E-InvoicingIndonesiaAccountant-reviewed
south-africa-vat

Asked to prepare, review, or classify transactions for a South Africa …

VAT / GSTSouth AfricaAccountant-reviewed
us-1099-nec-issuance

Tier 2 content skill for determining which contractor payments made by…

Income TaxUS FederalAccountant-reviewed
nepal-payroll

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

PayrollNepalAccountant-reviewed
south-korea-vat

Asked to prepare, review, or classify transactions for a South Korea V…

VAT / GSTSouth KoreaAccountant-reviewed
Cyprus Income Tax -- Self-Employed and Individuals

Asked about Cyprus personal income tax for self-employed individuals o…

Income TaxCyprusAccountant-reviewed
canada-tax-optimization

Advising on LEGAL tax minimization strategies for Canadian taxpayers —…

Tax OptimizationCanadaAccountant-reviewed
br-inss

Use esta skill sempre que houver perguntas sobre contribuições INSS (P…

PayrollBrazilAccountant-reviewed
sa-withholding-tax

Asked to compute, classify, or review Saudi Arabian Withholding Tax (W…

Cross-BorderSaudi ArabiaAccountant-reviewed
Venezuela Payroll

Asked about Venezuela payroll processing for employed persons. Trigger…

PayrollVenezuelaAccountant-reviewed
nepal-corporate-tax

ALWAYS read this skill before touching any Nepal corporate income tax …

Income TaxNepalAccountant-reviewed
ae-tax-residency

Any question about UAE tax residency. Trigger on: "UAE tax resident", …

Cross-BorderUnited Arab EmiratesAccountant-reviewed
pt-income-tax

Utilizar esta skill sempre que for solicitada ajuda com o IRS (Imposto…

Income TaxPortugalAccountant-reviewed

Canada

15 rules · Maintained by Edgar Lautsyus

Browse open review tasksHow maintainership works