This document provides information about the Negative Stock Control add-on for Tally. It introduces the module which prevents entering negative stock quantities in vouchers. The installation process is described as being automatic when downloaded from Tally Shop. Basic system requirements are listed as no additional hardware or software needed. Setup instructions are provided to enable the "Prevent Negative Stock" option in Inventory Features to activate this functionality. FAQs address purchasing, installation, version support, licensing and getting updates/support.