@Marty ********
Thanks for the info, I really appreciate it!
I’m currently dealing with Hawaii, and they still consider me a resident even though I’ve been living and working in Vietnam for over 20 years. The PDF files of the state tax office I’ve been directed to state that since I never officially gave up my Hawaii residency, I’m still required to file state taxes on my worldwide income. It’s been a bit of a struggle to get clear answers from them.
I haven’t read anything in the PDF files I was directed to about showing proof of residency outside of the state like what you did for California. I’m still emailing different sections of the tax office to get the contact information of someone who can give me specific information about my situation.
Thanks again for sharing your experience! It gives me hope that I might be able to resolve this.