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② 後台搜尋「Yzukar B2B Invoice Fields for KSeF」→ 直接安裝（推薦）
原文外掛簡介
Yzukar B2B Invoice Fields for KSeF helps WooCommerce stores collect and export cleaner Polish B2B invoice data.
The plugin adds:
A company invoice checkbox in checkout.
A Polish NIP field with checksum validation.
An optional e-invoice email field.
Order meta for invoice request, NIP, e-invoice email, and validation status.
A NIP column in WooCommerce order lists.
A WooCommerce > KSeF/NIP Export page for recent order CSV export.
The plugin stores data locally in WooCommerce order meta. It does not call external APIs, does not send data to KSeF, and does not include tracking scripts.
Yzukar B2B Invoice Fields for KSeF is a workflow and data-cleanup tool. It does not provide legal, tax, accounting, or KSeF compliance advice and does not guarantee compliance with any law, schema, tax process, platform rule, or accounting requirement.
