The "Karmatirtha Scheme" in West Bengal primarily refers to the establishment of rural marketing hubs. However, the search results also prominently mention the "Karma Sathi Prakalpa", which is a scheme that provides financial assistance (soft loans and subsidies) for young entrepreneurs. It is common for people to confuse or conflate similar-sounding schemes, so I will provide information for both, with a focus on Karmatirtha (the marketing hubs) and its related entrepreneurship promotion.