I want to create an s corp. I am a non resident of the usa.

What do you mean? Your personal account is completely separate. You will have to pay taxes from your business account.

A corporation is like another taxpayer. It has its separate bank account, file its own taxes and pay its own taxes. As per your personal account, there are no limits how much you can save or deposit into your account. Deposits are not subject to income tax.

No. If you don't have SSN you can apply for ITIN (taxpayer identification number) from the IRS. Or you can have an agent to apply for EIN for you. You can have have somebody else to file paperwork for you as well but it will going to cost you accounting fees. Many accounting firms offer services like this.

You will need EIN to open business account, to file tax returns and to pay taxes. Yes, you need EIN for your corporation. It is the corporate tax ID number.

I am not accounting firm and I am not located in Florida. I am independent contributor to Just Answer. Most accounting firms have a website. You can google search for accounting firms in FL.

The ITIN is for you, EIN is for your corporation. You will need ITIN to register your EIN. You will also need ITIN to file US individual tax returns if you are required to report any distributions.

You're welcome.

Here's a step by stem guide how to form a corporation in Florida: https://www.nolo.com/legal-encyclopedia/how-form-corporation-florida.html

Not without a work authorization. You engage in any services with intention to earn income in US you need work permit.

As long as you are not physically on US soil earning income, you do not need work authorization. Are you going to do consulting in addition to your c corp?

A corporation is already incorporated business. You do not incorporate a corporation. You cannot receive any income earned on US soil without work authorization. And it does not matter if you perform these services as individual or as employee of your corporation. Working in US without work authorization is illegal.

If you are asking for a legal advice you post the question in the wrong category. I am a tax professional, not immigration or business attorney.

You can receive income from US clients as individual, it is not US sourced income. What you do with it is entirely up to you.

If you earned money for your corporation, it will be US sourced income subject to US taxes. You are strongly advised not to mix your personal and business income and expenses.

An LLC is not a entity for tax purposes. A single member LLC is taxes as sole proprietorship, LLC with two members is taxes as partnership, LLC with Scorp election is taxed as Scorp.

Scorp is a pass-through entity, which means Scorp does not pay any taxes, the tax liability is passed to the shareholders on K1. If you have an scorp you are required to pay yourself reasonable salary so you will not avoid payroll taxes. As single member LLC you will pay self-employment tax on the entire profit from your business. When it comes to income tax, there's really not much difference. The difference is in deduction of your loses. Scorp loses may be subject passive activity and may not be deductible. You can alway deduct loses as sole proprietor. Scorp gives you certain corporate perks, like group insurance plan, 401K, profit sharing and such but requires a separate business return and is more costly to operate. Sole proprietorship (single member LLC) is filed on Schedule C attached to your tax return.