Just a comment. Be careful to whom you give your EIN, sales tax license etc... It's like giving your SSN and mother's maiden name.
Last year I had a guy trying to use my business' information to apply for 2 wholesale accounts and 1 credit card with Chase. Fortunately the guy used our main office phone number

Imagine the damage he could do
Later we realized that one company we were trying to get products information asked us to provide these information then disappeared.
Now, we are very very careful.