If you think CA taxes are a problem, try Canadian. I file WA, CA and Canadian.
I would ask the CA franchise Tax board. Remarkably, I had a strange issue with a document arriving before it matched their records, and they sent a letter. I was dreading contacting them. A person answered immediately, walked me through everything, triple checked I got it right, offered to follow up, told how to follow up etc. It was the best service I have EVER gotten from a Gov agency.
In Canada, as a US citizen, they now automatically flag you for a manual review, audit at least once, and my returns for the last two years took 11 months and 5 months. Both times I had high 5-digit refunds. The audit cost me 2.8K on a 3.2K side refund. In another case, the Canadian "IRS", mis-entered as income field and left 3 zeros off. As a result, my refund became a bill. They said if they want it corrected, I had to submit an amendment and pay 750 to have it processed. It was their typo!!!!
In Canada, you have a GST # for all businesses too.
I would not mess with it. My mom-stepdad did a CA tax avoidance scheme that was disallowed. The CPA and lawyers said to ignore it. 6k-> 72K bill after 6 years.
Good idea, but pay your taxes and make more trading!