You may or may not be "exempt" from state taxes, depending on your state of residence. Certainly California has no comparable concept of "foreign tax credits" and happily taxes your income IF you are a resident.
Maybe this will help:
<a rel="nofollow" target="_blank" href="
https://www.amexpattax.com/news/alleviating-double-taxation-foreign-income-state-level/">https://www...>
