The Tax Department is streamlining withholding tax and wage reporting forms and Web File applications. At a minimum, information must be in the highlighted fields, but other boxes must be completed if the nature of the payment requires it.This form is for general instructions that apply to all corporation tax forms. It includes a variety of topics about how to fill out your form. Contractors are required to complete the following information and submit the form to the Suffolk County Purchasing. Office. This page provides a graph of the current tax rates in Massachusetts. Several areas have an additional regional or local tax as outlined below. Securing your today and tomorrow. All bids must be filled out in ink, or be typewritten. The IRS views failing to pay payroll taxes as the cardinal sin of tax delinquency because a large portion of the payroll taxes are your employees' withholdings.