I have a small apt and I was wondering if each of my tenants should have their Individual TAX ID #'s? if so who how do I get or do that?

It’s up to you whether or not you want to rent to undocumented aliens.

I don’t use the tenants’ SS# for anything except to run their credit report and their criminal background check. If you don’t want to run credit reports, or criminal, that’s your choice-- not a smart choice, but it’s up to you. I can’t think of what else you’d need their SS# for.

If your tenants don’t have SS #'s, there is nothing you can do to get them for the tenants.