Exactly why I had an IRS EIN issues for my IL registered Single-Owner/Member LLC (a disregarded entity). One purpose was to protect my personal SSN and associate myself to, but legally separate myself from personal liability/assets from the LLC business. But there were 2 additional key reasons below;
1) BUSINESS BANK ACCOUNT - In IL (at least), I needed to apply for an IRS EIN for my LLC in order to open a "business" bank account. The LLC was issued the IRS EIN, which I was informed that EIN would be used to pay quarterly taxes. I still had the option to pull through any LLC distribution as income and report on my 1040.
2) W9 REQUESTS - All internal W-9 (between the LLC and Client) is filed between the LLC and Client - The IRS W9 clearly states "Give Form to the requester. Do not send to the IRS. I know what the instructions say, but I was informed to use the LLC EIN because the Client pays invoices to the LLC, not me directly.
Note: On Turbo Tax it is simple to associate the single owner LLC EIN with my personal income tax (which uses my SSN)
