United States federal
- Internal Revenue Service: irs.gov. Publications, forms (W-7, 8288, 8288-B, 1040-NR, 8840, T1135 equivalents), guidance.
- Cornell Legal Information Institute: 26 U.S.C. and 26 CFR. Authoritative public version of the Internal Revenue Code and the Code of Federal Regulations.
- U.S. Citizenship and Immigration Services: uscis.gov. Visa categories, green card pathways, naturalization.
- U.S. Customs and Border Protection: cbp.gov. Border admission, customs, vehicle import, I-94.
- Environmental Protection Agency: epa.gov. Vehicle import emissions, environmental compliance.
- Department of Transportation: transportation.gov. Federal Motor Vehicle Safety Standards.
- Federal Reserve: federalreserve.gov. Banking regulation, currency.
- Financial Crimes Enforcement Network (FinCEN): fincen.gov. FBAR (FinCEN Form 114), beneficial ownership.
Florida state
- Florida Statutes (official): flsenate.gov/Laws/Statutes. The full state code.
- Florida Department of Revenue: floridarevenue.com. Sales tax, documentary stamp tax, intangible tax, property tax administration.
- Florida Department of Highway Safety and Motor Vehicles: flhsmv.gov. Driver licence, vehicle title and registration, insurance proof.
- Florida Office of Insurance Regulation: floir.com. Homeowners insurance, Citizens Property Insurance, hurricane deductibles.
- County property appraisers: each county publishes its own appraiser site. Used for assessed values, exemptions, millage rates.
Canada federal
- Canada Revenue Agency: canada.ca/en/revenue-agency. T1, T1135 foreign property reporting, capital gains, foreign tax credit.
- Department of Finance Canada: canada.ca/en/department-finance. Tax policy, treaty interpretation.
- Canada Border Services Agency: cbsa-asfc.gc.ca. Re-entering Canada, declaration of imported goods, personal exemptions.
- Bank of Canada: bankofcanada.ca. Daily CAD/USD exchange rates (Valet API).
Canada provincial health plans
- RAMQ (Québec): ramq.gouv.qc.ca. Out-of-province coverage, residency rules.
- OHIP (Ontario): ontario.ca/OHIP coverage. Out-of-Canada coverage rules.
- MSP (British Columbia): gov.bc.ca/MSP.
- AHCIP (Alberta): alberta.ca/ahcip.
- Provincial equivalents for Saskatchewan, Manitoba, Nova Scotia, New Brunswick, Prince Edward Island, Newfoundland and Labrador, and the three territories are linked from the corresponding articles in chapter 07 (Health).
International
- Canada-United States Tax Convention (1980): Canada.ca tax treaty page. Article XIII (capital gains), Article XXIV (relief from double taxation), Article XXVI-A (estate, gift, and inheritance taxes).
- FEMA and NOAA: fema.gov, noaa.gov. Hurricane evacuation zones, flood maps, disaster declarations.