Do I need all of the shareholders’ consent for the S Corp election?
Yes. It’s really that simple. Here’s a link to the IRS page that’s chock full of info. PS – Spouses too.
California varies – sometimes it’s a matter of days, but sometimes, especially at the beginning of the year, it can take a couple weeks. You can always submit your documents on a rush (24 hours or even same day) basis. Other states? It really depends. Delaware’s quick.