Cross Border Calculator is an all-in-one API plus a WooCommerce plugin that automates the calculation of VAT, customs duties, and harmonized system code classification for international shipments. Integrated into the WooCommerce checkout or a custom web store, it displays fully landed costs to customers, preventing surprise fees and package refusals. Automated product classification of harmonized system (HS) codes eliminates manual lookups. Real-time tax and duty calculation cover US & EU sales, accounting for VAT rates, duty thresholds, and regulations. The plugin supports IOSS & DDP shipping methods to avoid unexpected delivery charges. Automated shipping label generation includes customs documentation, streamlining fulfillment. Also validates IOSS consignments and provides compliance data for audit reporting. Plugin installation is code-free & user friendly. Constantly updated with regulation changes.