Moving to Texas from California mid year

Thank you for any help on this... I have a W2 remote job. Company based in/I live in California. On June 1 2026 I will be moving to Texas (no state income) so I will not spend more than 6 months in California in 2026. Do I inform my employer of the move on January 1 2026 and start claiming residency in TX then (I already have a home there) Or can I wait until June 1 to inform my employer and get back all the California income tax at end of year that was withheld when I do my taxes. THANK YOU