I have a client that worked in WA but is a resident of AZ.  According to AZ department of taxation, they have to pay AZ state income taxes on the income from WA.  Their W2 from the WA employer does not have an EIN and I have to put something in for an EIN (it is pink, which is causing an error.)  I called AZ tax department and they could not help me.  Can someone tell me what to do so I can e-file my client's tax return?  Greatly appreciated.  Victoria