No. CA doesn't recognize "common law" marriages based on living together, or having kids together, or thinking of yourselves as married and holding yourselves out as married. Either you've gotten a marriage license and had it filed, or you're not marriied under CA law for any purpose, including tax status.
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If the entire nine years has been in California, no, you cannot. Yo cannot create a "common-law marriage" in California, no matter how long you live together.Ask a similar question
No, you can only file a joint tax return if you are married. You are not married and California does not recognize common law marriages.
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