Massachusetts Income Tax for Non-Resident working Remotely

Hello!  I accepted a new position as a financial consultant for a company that is headquartered in Massachusetts.  I live in Washington State and was hired to mainly help clients on the West Coast.  I have never been to MA and no plans to be there at all.  I was not told by the employer I would have to pay MA income taxes, but in reading the employee handbook, sounds like they will withhold.  And it seems the DOR site says I will have to pay state income tax since the company is located in MA, but all my past experience and what I find on Intuit is that I don't have to.  I did send a request to MA DOR to clarify, but hoping someone can respond before I get the answer as I am to start Monday.  If I had known this was the case, I would have negotiated a higher salary.  In WA, we don't have an income tax, instead we pay really high sales taxes (over 10%), higher property taxes and excessive gas taxes.  I can't avoid that since I live here so in essence I would be double taxed.  

Looking for some advice or resources to help me not pay the MA income tax.  

Thank you!