How much new business does it take to add $100,000 or even $1 million to the bottom line? Even with tax deadlines looming for companies that filed extensions, there is still time to maximize the benefits of all available tax credits and incentives. A powerful tax incentive known as the research and development (R&D) tax credit is available in the United States at both the federal and state levels to help manufacturers recover a significant amount of R&D costs…