Invoice-NT is an extensive invoicing program for small and medium-sized enterprises along with warehouse service, payment and VAT registers. It allows to issue all kinds of sales documents (e.g. bills, export and corrective invoices), keep stock records (database of goods, stocks, automatic calculation of margins for particular groups of goods), as well as cash register, payments and transfers (KP and KW documents, bank statements downloading, generation of transfer forms).

The program is also equipped with serial correspondence modules, as well as GSM, which contributes to the creation of a professional image of the company (SMS service, reminders of arrears and obligations). Invoicing-NT is supported by the Intrastat system, which enables the generation of statistics on the trade in goods between the Member States of the European Union and allows for network operation.