WFH in WA but a company at CA

I work for a California's tech companies who allows their employees to work from anywhere until at least August 2021. However, said tech company is still collecting and sending my wages/salary to the state of CA although I'm not a resident of CA. (I'm a resident of WA because I stay in WA for a long time and I took the job offer at end of 2019, but back to WA and WFH at March 2020, so I never step up CA resident)

 

To be clear on my situation above:

- was hired for onsite work in California, but only stay in California about 1 month in 2019 and 2.5 months in 2020.

- my employer continues to withhold CA income taxes to California's Franchise Tax board

 

My questions:

- I should be entitled to receive a refund of my income taxes for April 2020 - Dec 2020 or not?