CA Security Deposit Issue

[Danielle P.]

Hello from California! My partner and I gave notice to vacate our rental home on September 21st which makes our lease end on October 21st. We did a walkthrough with our landlord and vacated the premises on October 9th - the landlord asked us to leave the keys in a specific area and they understood (and verified via text) that we were vacating on that day. We were under the impression we should have received both an itemized list of deductions and the remainder of our security deposit by October 31st (assuming that October 10th was the 1st full day after vacating). Are we wrong to expect the return of our full deposit by now? Or does the 21-day limit not start until the last day of our lease? 

We just want to make sure we have the right information before sending the letter. Thank you!