To elect to take the Section 179 Deduction, simply fill out Part 1 of IRS form 4562, available for free below, and attach it to your tax return (much like any other additional form, such as a "Schedule C" or similar).
Download IRS form 4562 for tax year 2012 (2013 not in circulation yet).
Download instructions for IRS form 4562 for tax year 2012.
If you do not feel comfortable completing the form yourself, your tax preparer can easily take care of form 4562 for you. Your tax preparer may also be able to advise you of additional Section 179 Deduction and Bonus Depreciation savings that may be available to you.
As we mentioned previously, most equipment as well as off-the-shelf software that you purchase, finance or lease for business-use is going to qualify for the Section 179 Deduction. You can verify whether or not the business equipment that you have purchased or leased qualifies for the Section 179 Deduction by reviewing our list of qualifying property, software, and equipment.