Hi jmma, thank you for joining the "Ask the Experts: Moving" special forum today.
Congrats on the upcoming move.
You would file part year MO income tax return and part year CA income tax return for tax year 2021.
MO highest income tax rate is 5.4% while CA 12.3%.
In general, you would actualize/earn income while in MO as much as can. For example, if you have capital gain, realize it while in MO. If you have capital loss, realize it while in CA. If you have any MO company benefits, such as bonus, vacation pay, make it happen while in MO.
Below are a few great TurboTax articles for reference.
How do I allocate (split) income for a part-year state return?
https://ttlc.intuit.com/community/income/help/how-do-i-allocate-split-income-for-a-part-year-state-r...
How do I file a part-year state return?
https://ttlc.intuit.com/community/state-taxes/help/how-do-i-file-a-part-year-state-return/00/2605
Hope this helps.
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