My FAANG employer and my CPA both agree I owe tax on RSUs that “partially vested” while a resident. An example of 48 shares of RSUs that vest 1/48 every month f

My FAANG employer and my CPA both agree I owe tax on RSUs that “partially vested” while a resident. An example of 48 shares of RSUs that vest 1/48 every month for 4 years (48 months), and I lived in CA for 6 months after they were granted (not vested, granted). In months 1-6, all were 100% California taxable. In month 7, I owed 6/7ths of the normal California tax. In month 8, it was 6/8ths. In month 48, the final vest, will be taxed by California at 6/48ths of a full resident. My new state also taxes them, but I can deduct taxes I pay to California so I don’t get double-taxes.