California taxes for WA based company

I recently joined a company in WA but because of covid started from CA and staying with a friend here. I received my sign on bonus some days back with huge CA tax withholding (about 11%). I am also about to get my RSU grant to be vested over 4 years. It's been less than 30 days since I joined my company. Would moving to WA helps now in getting bonus money back from CA? Will my RSU be taxed by CA as well for next four years if I am here when grant is allocated to me in couple of weeks? My permanent job location would definitely be WA once covid ends. Any other tips on how best to handle this situation? #taxes #personalfinance #investments