@LAtoParkCity one small clarification. While UT will give you credit for taxes paid to CA, normally, states only give you the credit that you would have paid to its state or what you actually paid to the other state, whichever is lower.
So if you pay $10,000 on the bonus to CA when you were already a UT resident, and if it were paid to UT, the tax would have been $2000, the tax credit on the UT tax return will be $2000 - not $10,000.
