SOLE PROPRIETORSHIP
Businesses are registered, owned, and operated by one person, this means you can report your business income and costs on your personal tax return.
Employers must report to the IRS the FICA is deducted from all employees' payroll (FICA covers social security and Medicare). The equivalent for all self-employed individuals is SECA (Self-Employed Contributions Act), which requires you to report and pay employer and employee.

C CORPORATIONS
All businesses registered as C corporations are legally divided from the owner which means the filling will be more, but is safer, this way you can pay the taxes of your company besides your own. C corporations must be taxed at a flat income rate of 21% further and an individual tax will be sent to all shareholders (double taxation).
Shareholders that are investing time and effort actively into the same business will be considered employees of the same company.

S CORPORATIONS
S corporations have the same bases as C corporations, except for not going through the double taxation process.
Personal income tax returns must be reported as profits and losses by the proprietorship, therefor the business itself does not have to pay any taxes.
Any shareholders determined as employees will have to pay their own self-employment taxes, even tho their net profit is not taxed.

SMALL-BUSINESS TAXES — WHAT YOU NEED TO KNOW ABOUT THEM

Estimated Tax
It’s a calculation of self-employment and personal income tax.
Property Tax
Taxes must be paid directly to the county or city where your business property is located.
Payroll Tax
The business must pay for the employee's taxes on each payroll.
Self-Employment Tax
As such, you must pay the full 15.3% tax to fund Social Security and Medicare instead of when FICA is in a place where you pay only half of your tax cut (7.65%).
Excise Tax
Exclusive for products like liquor, cigarettes, and gasoline.
Sales Tax
Some states require full disclosure and payment for each sale done. This requirement does not apply to every state.