@BobKamman California uses revenue for apportionment; not 3 factors (except in limited circumstances). So if there is no CA source revenue but CA nexus, you'd wind up with CA K-1s with no CA source income.

So the K-1 could be correct. If the whole K-1 on its face (federal and all states) looks to be correct, I'm not about to question it. On the other hand, if it looks like a giant mess I would.