/admin/shipping) to configure everything covered on this page.
Tax Models
Site Store Pro supports three regional tax models. The system activates the correct model automatically based on the merchant country you configured in your store settings.- US Sales Tax
- Canadian Taxes
- International VAT
US merchants use an exclusive tax model — prices in your catalog do not include tax. Tax is calculated and added on top of the order subtotal at checkout.
Per-State Sales Tax Rates
Configure individual state percentages under Admin → Shipping & Taxes → Tax Rates.You can add or override any state rate directly from the admin panel. Site Store Pro calculates tax at checkout using the formula:
Only the customer’s delivery state determines which rate applies — not your store’s state or billing address.
Flat-Rate Shipping
Configure flat-rate shipping rules under Admin → Shipping & Taxes → Shipping Rates. Rules can be based on any combination of the following criteria:Example Rate Table
You can configure separate rule sets for domestic and international shipments. Create as many rate tiers as your fulfillment strategy requires — Site Store Pro evaluates all matching rules and applies the correct rate at checkout.
Shipping Display Options
Control how shipping options appear to customers at checkout using the Shipping Display Method dropdown. Three presentation modes are available:Flat-Rate Override Dropdown
Force your configured flat rates to render as a clean select menu. Customers choose from your predefined options without seeing carrier branding.
Live Carrier Rate Dropdown
Display real-time rates from FedEx, UPS, or USPS directly in the dropdown. Rates are fetched live based on package weight and destination at checkout.
Custom Method Dropdown
Present fully custom shipping choices with delivery timeframe labels — for example, “Express (1–2 Days) — $15.00”. You control both the label and the price.
Real-Time Carrier Integrations
Enable live carrier rate retrieval by toggling the relevant drivers under Admin → Shipping & Taxes → Carrier Integrations.Site Store Pro includes a Mock Real-Time Rate Provider that simulates carrier responses without requiring live API credentials. Enable the mock provider during development and QA to test your checkout shipping flow end-to-end before entering production credentials for FedEx, UPS, or USPS.
Multi-Warehouse Fulfillment
Manage your fulfillment locations under Admin → Shipping & Taxes → Warehouses. Each warehouse record contains the following fields:
Once you have created your warehouse records, link individual product variant inventory to a specific warehouse using the Location field on the variant inventory screen. Site Store Pro uses the warehouse address as the shipment origin when calculating carrier rates and generating ShipStation orders.