EIN required?

Hello,

 

My 17 year old created an LLC with me as a 5% owner because of her age.  If I'm reading the IRS site correctly, I have to pay for an EIN number to be generated because this is not a single member LLC and we're "not a married couple in a community property state." 

 

The Business edition of the software won't let me continue without it, but she claims that "Washington state didn't require me to make an EIN when I created the company." 

 

Please help me understand this.  Thanks.