From your comment:
My drivers license is from Las Vegas, Nevada, and I'm not registered
to vote in either state.
I am working from the assumption that you will be able to prove you are a resident of Nevada and work in California. See California Pub 1031 for Guidelines for determining who is a Resident.
I work full time in California and part time in Las ...
Your situation is complex for two reasons, only one is related to COVID.
I gave up my apartment (and California address) to be with family in
North Carolina. My company knows about this arrangement and approved
this temporary work relocation. I intend to move back to California
next July when my company's offices are slated to re-open.
If you had moved out ...
In general, unless there is an agreement between the states, you are taxed in both the state of residence and the state that is the source of the income. If those two states are different, you can always claim a credit in one of the two states (exactly which one depends on the pair of states; for CA and NC, the credit is claimed in the state of residence), ...
From the South Carolina Department of Revenue, Individual Income Tax FAQ
What is the filing requirement if one taxpayer is a resident of South Carolina and one is not?
If you file married filing jointly for federal purposes, you will also file married filing jointly for South Carolina purposes. If one taxpayer is ...
Should I wait to sell them after I move to WA? Will that help me avoid
the 10% tax that CA imposes?
Ignoring the risk of waiting.
You will have to provide enough proof that California can't claim you are still a resident of their state.
That means don't sell until you have completely severed all ties to the state of California. Get a new drivers license, ...