Wait....it is ONLY taxable by Utah if you were a full-year UT resident.
.....a 1099-INT from any financial institution in CA.....or any other state.....it is only taxable by Utah.
You DO Not file a CA tax return for a 1099-INT from a CA location/bank/broker.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*