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Frequently Asked Tax Questions

Small Business/Self-Employed/Other Business - Form SS-4 & Employer Identification Number (EIN)


Rev. date: 1/2010


Is an employer ID number the same as a tax ID number?

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previous topic occurrence Identification Number next topic occurrence
previous topic occurrence Individual Taxpayer Identification Number next topic occurrence
previous topic occurrence New Trade or Business next topic occurrence


Rev. date: 1/2010


Does a small company need a tax ID number?

previous topic occurrence Federal Employer Identification Number next topic occurrence


Rev. date: 1/2010


Under what circumstances am I required to change my employer identification number (EIN)?

Application for Employer Identification Number
F554
previous topic occurrence Federal Employer Identification Number next topic occurrence
previous topic occurrence Home Used for Business next topic occurrence
previous topic occurrence Identification Number next topic occurrence
previous topic occurrence Individual Taxpayer Identification Number next topic occurrence
previous topic occurrence New Trade or Business next topic occurrence
previous topic occurrence Self-employment next topic occurrence
Understanding Your Employer Identification Number (EIN)

If you already have an EIN, and the organization or ownership of your business changes, you may need to apply for a new number.
Some of the circumstances under which a new number is required are as follows:
This list is not all inclusive. Please refer to the website under Business, then Employer ID Numbers.

Rev. date: 1/2010


Do businesses have to obtain the taxpayer identification number (TIN) from vendors and keep it somewhere on file?

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previous topic occurrence Individual Taxpayer Identification Number next topic occurrence
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previous topic occurrence New Trade or Business next topic occurrence

In general, businesses are required to obtain the TIN from vendors if they are required to file any information return, document or other statement that calls for the taxpayer identification numbers (TINs) of other taxpayers. Form W-9 (PDF), Request for Taxpayer Identification Number and Certification, can be used to make the request. The business should also maintain the verification of these numbers in their records.