Really?
Your EIN (employer ID number) is assigned to you by the IRS, if you apply for one. You are required to have an EIN if you run a business with employees, and it is recommended even if you are a sole proprietor or single member LLC with no employees.
But no one on this board knows your EIN. And it's pretty irresponsible if you lost it. The IRS can look it up for you if you call next week. If you used your EIN on a schedule C on last year's tax return, download the PDF or print a copy from your account.
