Taxpayers can download a printable PDF of the W-3 form at the IRS website, according to the IRS. Simply enter W-3 in the search bar located in the top right of the home page, and the results are listed. The current year's W-3 form is listed at the top.
The W-3 form is what is sent to the Social Security Administration to show the total Social Security wages, Medicare wages and all withholdings for employees of the previous tax year, explains About.com. The form is submitted along with copies of all employee W-2s, according to U.S. Tax Center. It should be filed no later than the end of February.