@stech
EFIN = Electronic Filing Identification Number
EIN = Employer Identification Number
FEIN = Federal Employer Identification Number
People often call an EIN an FEIN, but the official IRS term is EIN, not FEIN. They are the same thing.
An EFIN is 6 digits. An EIN (or FEIN) is 9 digits, in the format xx-xxxxxxx.
Which one are you asking about?
