I currently have a full time W2 job, and also receive some 1099 income on the side. I have a solo 401k setup for this income, which required me to setup a federal EIN.
I have been using my SSN for the 1099 reporting, but am about to have a new client.
Can I give this client my EIN for the 1099, or should I stick with my SSN? If I can use my EIN, does it make any difference to the IRS?