CA tax return for nonresident, how to calculate interest and dividends?

[deepimpact]

I'm a resident of WA state and spent full year here, a few times over the year traveled for work to CA which crossed the threshold to pay taxes in CA and thus I have a Box 16 filed in my W-2 form with prorated amount. Overall amount is insignificant since I only spent in CA around 15 working days, however while filing tax return I'm trying to figure out if I need to at least partially (e.g. using percentage based on number of days spent 15/366 for 2024) report any other income that I had - dividends and interest .

On the website they say income from California sources: https://www.ftb.ca.gov/file/personal/residency-status/part-year-and-nonresident.html, however it's unclear to me how they evaluate if these are CA sources or not, e.g. some of the dividends and interest are from public trade stocks of the companies that are based in CA.

Thanks in advance for help!

[MaryK4]

 You do not have to prorate interest and dividends to California.  In general, you report the dividends and interest to your resident state.