The State Organization Index provides an alphabetical listing of government organizations, including commissions, departments, and bureaus.
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If your business has a received a Form ST-4 from a potential buyer, you can find out if that buyer is registered with the Massachusetts Department of Revenue.
Go to MassTaxConnect.
Under the business tab select Verify sales tax resale certificate. Under ID type select sales tax or meals tax.
Then you will be asked to provide the following:
For further information about the use of resale certificates, see 830 CMR 64H.8.1 Resale and Exempt Use Certificates.