Yes, if you moved from California to Oregon in November 2024, you will need to split out most of your retirement income for a California Part-Year Resident return.
Easiest way is to divide your total income by 12, and multiply by number of months lived in CA.
You're correct that you don't need to file an Oregon return.
Here's more info on How to File a Part-Year Resident Return and Allocating Income for a Part-Year Resident.
@mjckhc
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