If you must go to USPS, take it to the counter, and ask them to date stamp it there.
However, we also have ballot dropboxes up and down the state.
Here's the complete list.
caearlyvoting.sos.ca.gov
caearlyvoting.sos.ca.gov
Any registered voter can go to a county elections office in person to request and receive a vote-by-mail ballot.
california is gonna have so many mail in ballots that don’t get counted because people don’t know the new USPS rules that are impacting mail in voting.
tl;dr don’t put your ballot in the mail today, find a ballot drop box.
www.kqed.org/news/1208537...
State officials are warning that some ballots mailed too close to Election Day might not be counted. Here are other recommended ways to submit your ballot instead.