New Hampshire Form EFS-3 is a filing form for businesses in the state of New Hampshire who wish to register for a tax ID number. It is an application for a New Hampshire Employers' Withholding and Unemployment Tax Account. The form is used to register for the withholding of the state income tax from employee wages and the payment of the state unemployment tax. The form is issued by the New Hampshire Department of Revenue Administration. There are two versions of New Hampshire Form EFS-3: the EFS-3, which is for employers filing on a quarterly basis, and the EFS-3W, which is for employers filing on a weekly basis.