Thanks for the response, but I don't think I follow how this is calculated in Turbotax. Using your example, the percentage of the total income from California is used to calculate the tax. How does Turbotax know how much in dividends and IRA withdrawals I received while residing in each state since there is nothing that I have seen that asks when in the year I received it? For example, if I received a stock dividend of $1000 in November when I was a permanent resident of Washington, that should not be included in the California return. But Turbotax doesn't provide a method of specifying the date or state where this was received.
(Note that I am only asking about dividends and IRA withdrawals, not wages or earned income which I know that California still taxes regardless of my state of residence.)
