What is a FW3-2015 Transmittal of Wage and Tax Statements?

Form W-3 is a transmittal form that's sent to the Social Security Administration to show the total earnings, Social Security wages, Medicare wages, and withholding for all employees in the previous year. The official title of the form is "Transmittal of Wage and Tax Statements."

How to File a FW3-2015 Transmittal of Wage and Tax Statements?

Information about the employer is entered in boxes A through H Most businesses checkbox 941 for "Kind of Payer". The 941 form is the quarterly wage and tax report form completed by most employers. Other options include a household employer and others. Most businesses would check the "none apply" box for "Kind of Employer". The other boxes are for non-profit organizations and federal government employers. The establishment number section is provided so employers can identify different areas of their businesses either by location, subsidiary, or division. You must separate out W-2 and W-3 forms for each establishment if you identify establishment numbers in this section, or you can combine all your establishments and submit all W-2 forms together along with one W-3 form.

Sources: https://www.thebalancesmb.com/what-is-a-w-3-form-398523