I thought the FTB rule was that you were subject to tax if the options themselves were awarded in CA, regardless of eventual vest location. Unless you were a hired remote employee of a CA company, I think.
Let's assume my company goes IPO in 2024 (it's a lottery, I understand), and assume each share is worth $10.00. Which means my 10,000 shares will be worth $100,000.
So I will owe tax on 7500 of those shares to CA? Because I've been there 3 out of those 4 years? That is ($10.00 - $1.00) * 7500 = $67500 of my income will be taxed by CA? And remaining amount will be taxed by Texas?
Even if I move to Puerto Rico, where there are no capital gains, I still owe CA taxes?