Section 179 is a business tax code that allows business owners to take deductions on select equipment, instead of claiming asset depreciation. Show the average cost value during the taxable year of real and tangible personal property used in the business within.Section 179 refers to a section of the United States Internal Revenue Code that allows businesses to deduct the cost of certain types of property as an expense. Section 179 allows eligible businesses to deduct the full purchase price of qualifying equipment in the year it was put into service. Commonly referred to as the Sec. Enter the amount of foreign taxes deducted on federal form. 1065, Schedule K, line 21. What is Section 179? Section 179 is an IRS tax code which allows businesses to deduct the full purchase of qualifying equipment like work vehicles. This item addresses how S corporations and partnerships that have a Sec.