I would like to purchase an active restaurant from its sole owner. I don't have a SSN however, I registered for an ITIN and still have it. I read that I can use an EIN to open a business but to apply for it, it asks for my SSN or ITIN. My question is, once I register for the EIN, would I need any other paperwork/authorizations? Also, seeing as how I don't have a SSN, would it become apparent when I submit the registration for the EIN? (ie. is the status of my SSN linked to my ITIN?)