My restaurant is tanking on Sunday, when's the earliest I can file for California Unemployment?

This is the 2nd time in 4 years a place I’ve worked at is tanking and closing down. Corporate gave this information to my GM and one of the managers told me Sunday is our last day. Only 4 of the 30 people who work there know about this.

So yes back to my OP when can I file? I will be going to school, while searching for a job. I’m really ticked that we didn’t even get a months notice so I could adequately look for another job.