An Employer Identification Number (EIN) is also known as a Taxpayer Identification Number (TIN). A sole proprietorship that has no employees and files no excise or pension tax returns is the only business that does not need an employer identification number. In this instance, the sole proprietor uses his or her social security number as the taxpayer identification number. To obtain an EIN, you must complete Form SS-4, Application for Employer Identification Number. After you have completed the Form SS-4, you can apply online, by mail, fax or by phone. Further information can be found at the Internal Revenue Service (IRS) website: https://www.irs.gov/businesses/small-businesses-self-employed/employer-id-numbers-eins
Connecticut State Identification Number
You must obtain a Sales and Use Tax Permit from the Connecticut Department of Revenue Services if you intend to engage in any of the following activities in Connecticut:
To register for sales and use taxes, use Form REG-1, Business Taxes Registration Application. See the section titled, “Applying for a Sales Tax Permit “, at the Department of Revenue Services website: https://portal.ct.gov/DRS/Sales-Tax/Tax-Information#:~:text=Go%20to%20myconneCT%2C%20under%20Business,for%20your%20customers%20to%20see.
SOURCES: Internal Revenue Service website; Revenue Services, Department of, State of Connecticut website
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CONTENT LAST REVIEWED: February2023