For more information on local tax assessments for personal property and real estate contact:
Treasurer & Collector of Taxes
36 Court Street, City Hall Room 112, Springfield, MA 01103 (map here)
Sole proprietorships without employees can use the proprietor's social security number as a business identification number, providing he or she uses his or her own name in the business.
Partnerships and corporations with or without employees, and sole proprietors with employees, must obtain Form SS-4 (Application for Employer Identification Number) from the IRS or Social Security Administration. You can download the form from the IRS website at www.irs.gov/pub/irs-pdf/fss4.pdf
Partnerships and corporations with or without employees, and sole proprietors with employees, must obtain Form TA-1 from the Massachusetts Department of Revenue, Taxpayer Assistance Bureau.