I have a client who is a sole proprietor and now wants to move the assets into an LLC. The sole proprietor already has an FEIN and doesn't want to get a new FEIN because it would require the sole proprietor to get new bank account, set up a new payroll account with IRS, notify hundreds of vendors, etc. Big hassle.

Can she set up a new LLC, move the sole proprietor assets into the LLC without having to apply for a new FEIN?