Greg Knox has first-hand knowledge of the business benefits of tax savings. The president of Franklin-based Knox Machinery said a tax reduction called “bonus depreciation,” which allows companies to buy certain equipment and then deduct 100 percent of the acquisition cost, has helped boost company sales. However, the tax incentive, along with a host of others, are set to expire or be reduced at year’s end, unless Congress extends them. The loss of these programs could cut into bottom lines of many firms, or at the very least, slow down spending where incentives have provided businesses a reason to buy...