Needle Syndicate uses the following third-party data to calculate Florida sales tax by county at checkout.
- ZIP code to county mapping: United States ZIP Code Database by simplemaps (free edition).
- Supplementary postal code data: GeoNames, licensed under CC BY 4.0.
- County surtax rates: Florida Department of Revenue, Form DR-15DSS (calendar year 2026).
Sales tax is charged only on orders shipped to Florida addresses. Rates are updated when the Department of Revenue publishes changes.