I didn't know that. I spent about 20 years doing HR and payroll, including just after IRCA passed in 1986. An I9 form has specific requirements; employers in compliance need a SS card. Maybe not in CA any more.
It seems like IRS accepting taxes/issuing ITIN should imply legal status of some kind.
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It seems like IRS accepting taxes/issuing ITIN should imply legal status of some kind.