InsERT Subiekt123 is advanced invoicing and sales-management software offering functions tailored to small and medium-sized enterprises. It enables transparent and efficient management of sales and invoicing. Scope: Issuing invoices – quick and easy generation of various invoice types (VAT, pro-forma, e-invoices) in line with legal requirements. Managing products and services – recording products and services. Warehouse integration – integration with warehouse systems, facilitating stock monitoring and automation of goods-flow processes. Reporting – detailed reports on sales, revenues, and receivables. The intuitive interface and process automation speed up invoicing and give full control over finances.