I think the first step in this is the form # you're filing. CA 568 is for single-member LLC's. CA 565 is for CA partnership returns, which is the default tax treatment for a multi-member LLC.
I'd move over to the partnership module and see if that solves your problem. On the return, make sure both CA and NV are added as states, and then CTRL+E the income to itemize the split between CA and NV.
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