What if your great business idea is not so great after all? Do you make it work at all costs, or do you take the hard road and turn your business plan upside down? It happened to TwinnTax, a startup that originally developed software to simplify tax returns. With the Start it @KBC network of coaches, mentors and other startups as a sound board, founder Olivier decided to drastically change its business model . Years later, that transformation turned out to be a vital move for the future of TwinnTax.