Massachusetts Department of Revenue

Buyer requires completion of the Massachusetts Substitute Form W-9 for tax reporting purposes. The form collects taxpayer identification information necessary for proper tax filings. Buyer needs this information to comply with IRS requirements for information returns.

• 6/30/2028 - Proposal Due Date

• Be a U.S. person or resident alien
• Have a valid Taxpayer Identification Number

• Complete taxpayer identification information
• Provide business name and classification
• Enter legal and remittance addresses
• Supply tax identification number
• Certify under penalties of perjury
• Indicate state employee status
• Sign and date the form
• Submit to the requesting department