I have a California LLC and wish I didn't. It has been nothing but an albatross around my neck. I am almost certain I will shut it down at the end of this year.
Look, if you're reading articles like this one, don't do it. Just don't do it. Get competent legal and accounting advice first.
I formed my LLC four years ago when an interesting contracting project came my way. I'd worked as a 1099/Schedule C contractor in the past, but this client wanted me to have an LLC. OK, no big deal.
Then it turned out they also required the LLC to be taxed as an S Corp. No big deal there either, it's a simple IRS form to make that election.
Now guess what? You have to start filing 1120S corporate taxes plus the California equivalent. All the LLC/S Corp income flows right through onto your personal tax return, but you also get to get to file 940 and 941 payroll tax forms and the state equivalents.
And whether your LLC is taxed as an S Corp or not, you have to pay the $800/year California minimum tax on it. Yes, even though the LLC/S Corp really has no net income of its own (as it all flows into your personal tax return), you will owe that $800/year. Even if you create your LLC in another state.
Do not try to do this yourself. You will get it wrong and will pay many thousands of dollars in penalties as I have.
I finally realized I would be much better off just working for another company and letting them deal with all these headaches. They have an entire team to deal with it! If I had a time machine, I would have stuck with regular employment instead of thinking of myself as an independent business.
Forget about the fabled "corporate veil". If the IRS and FTB decide they want their money, they are going to get it.
If you do think this still sounds like a good idea, you must use a payroll service to pay yourself. After my initial fiasco of trying to do it myself, I started using Gusto [1] and they are pretty great.
For filing the LLC itself, I used SunDoc Filings [2] and they are really good too. They helped me on very short notice when I made a mistake on my LLC filing that would have caused it to be rejected.
But really, think twice, or a dozen times, before you open this can of worms.
Sorry for all the italics. :-) But this is something where I have some painful experience, and if I can help steer people away from it I hope it will be helpful.
[1] https://gusto.com/
[2] https://www.sundocumentfilings.com/