My question involves unemployment benefits for the state of: CA

Hi, I'm near the end of my initial 26 weeks of benefits from my original claim in CA. I'm wondering if there's anything I need to do in order to file for extension. I couldn't find any info on the CA unemployment website as to whether this happens automatically or whether I have to do something. I think I have 1 month left. Should I expect something in the mail before the end?

Thanks,
Adam