This page has the information you need to fulfill your business tax obligations to the Commonwealth. If you need to report child abuse, any other kind of abuse, or need urgent assistance, please click here. Business Taxes Businesses come in all sizes — from large multinational corporations to sole proprietorships. You can also learn how to apply for an Employee Identification Number EIN , request a certificate of good standing, or find out about the latest business tax credits. From verifying a sales and use tax resale certificate to finding the latest information on corporate excise and withholding tax — we look forward to working with you.