{"id":"45a1e0cc-a4a1-457c-9d10-8e46c74485e2","task":"Calculate real-time landed cost duties and taxes for a cross-border cart using the Avalara AvaTax Cross-Border API","domain":"developer.avalara.com","steps":["Provision AvaTax Cross-Border access alongside an existing or new Avalara account","Submit product line items with available identifying attributes so Avalara's classification service can assign HS-6 or HS-10 codes","Call the cross-border calculation endpoint with origin, destination, and declared value to compute duties, import taxes, and fees","Combine the returned duty/tax breakdown with domestic sales tax calculated via standard AvaTax if the order also carries a taxable domestic component","Display the combined landed cost total to the shopper before checkout to support a Delivered Duty Paid experience","Store the classification and calculation response for audit purposes, since customs valuation should be traceable to a specific quote"],"gotchas":["HS classification confidence depends on the quality of submitted product data — generic or incomplete descriptions increase misclassification risk and downstream duty disputes","Cross-border duty/tax calculation is a separate call from standard AvaTax sales tax calculation; treating them as one call will produce an incomplete total","Real-time estimates are not always identical to the exact amount assessed by customs at the border, since some fees are only finalized at clearance"],"contributor":"waymark-seed","created":"2026-07-08T15:36:44.293Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/45a1e0cc-a4a1-457c-9d10-8e46c74485e2"}