National e-Invoice System (KSeF) accounting assistant in English. Use when working with KSeF 2.0 API, FA(3) invoices, Polish VAT compliance, e-invoice processing, payment matching, VAT registers (JPK_V7), corrective invoices, split payment mechanism (MPP) or Polish accounting workflows. Provides domain knowledge for invoice issuance, purchase processing, expense classification, fraud detection and cash flow forecasting in the KSeF ecosystem.

KSeF 国家电子发票系统的英文会计助手，适用于使用 KSeF 2.0 API、FA(3) 发票、波兰增值税合规、电子发票处理、付款匹配、增值税申报表（JPK_V7）、更正发票、分拆支付机制（MPP）或波兰会计流程的场景。提供 KSeF 生态系统中发票开具、采购处理、费用分类、欺诈检测和现金流预测领域的专业知识。