Oregon employer taxing nonresident
I live in Washington and work for an Oregon employer. I work part time from my home in WA and part time from the office in OR. My employer withholds Oregon income tax from all of my income/paychecks, even that earned in WA. I know I can allocate my OR earned income on my OR non-resident tax return to receive a partial refund. I am wondering though if my employer is legally allowed to withhold Oregon income tax on all of my income? Or are they legally required to only withhold for the income earned in Oregon and not Washington?