To elect to take the Section 179 Deduction, simply fill out Part 1 of IRS form 4562, and attach it to your tax return. Section 179 of the tax code allows business taxpayers to deduct the cost of certain property as an expense when the property is first placed in service.Section179.Org is a free resource answering Section 179 questions, with tools and information on how businesses can benefit from the Section 179 Tax Deduction. Under Section 179, businesses can deduct a set amount of the cost of new business assets, giving purchasers more flexibility on when they take the deduction. IRS Section 179 allows businesses to deduct the full purchase price of qualifying equipment and software. Learn more about this tax code. Section 179 allows business taxpayers to deduct the cost of certain property as an expense when the property is first placed in service. Section 179 has a limit on the annual deduction.