Form W-3 is the transmittal copy of Form W-2. This form states the tax and wage statement of all the employees while Form W-2 consists of information such as medicare wages, SSA wages, and other various withholdings. Essentially, Form W-3 is the summary of filed W-2 Forms.
Form W-3 is required to be submitted along with Copy A of the W-2 Form for each employee. The total of each tax and wage statement on Form W-3 must equal to the total of all the tax and wages reported on the filed W-2 Forms.
Paper Filing Deadline
Note: The SSA strongly recommend employers to file Form W-2 electronically. Form W-3 is required only when paper filing.