You can use this website to help you find your CA corporation number.
If you have not elected to be taxed as a corporation and do not have a corporation number from the State of California, you probably should be filing an LLC return (Form 568/3522) and not a corporate return (100S). If you are an S-corp., you should be able to find your corporation number from the website above and use that to file your corporate tax return. The fee is paid on Form 3586.
100-ES vouchers are for (corporate) estimated tax payments for 2020. Based on the forms that are generating, you have filed as a corporation. If you are not a corporation, go back through TurboTax Business and file a non-corporate return.
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