It depends. If you worked for the same company, they may have listed both the California portion and the portion that you earned after moving from California. If it is already separated on your W-2, your work is done for you already.
If it isn't, however, then you may prorate. One way is to divide the number of days you lived in California by 365, and then multiply that amount by the overall income earned. If the overall income earned on the W2 in question is not based on the full year, then you would divide the number of days in California by the number of days you were at that job in 2018. (Of course, if the W2 is reporting only California income, you don't need to adjust it: the correct amount is already reporting).
If you prorate, make sure you keep a record of how you calculated the California portion in case they ask. You don't need to send it in with the return, but if they ask for it in the future, you can provide it for them.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
