If the grant date for an RSU was made while a CA resident, and the RSU vests when a CA non-resident, then part of the RSU value is taxed as a CA source. For example, if the grant date is Jan 1, 2018, I move to another state on June 30, 2018, and vest on Jan 1, 2019, then 50% of the value of the RSU is taxed in CA.
How do I enter this in TurboTax?
