If I am freelancing, do I need to file anything besides 1040-ES?

You will report your income made freelancing on Schedule C of your Form 1040.

Your first step as a freelancer is to gather and report all sources of your income. If you're like many freelancers, you have many sources of income.

When you're self-employed, you are your own boss—which is great news until tax time. In addition to regular income tax, freelancers are responsible for paying the self-employment tax of 15.3%. This tax represents the Social Security and Medicare taxes that businesses pay and that employees have taken out of their paychecks automatically. As a self-employed freelancer, you are considered both the employee and the employer.

As a freelancer, you'll likely have more business expenses than a typical employee, and you can take a number of tax deductions not commonly allowed as a regular employee. However, you're only allowed to take deductions that are ordinary and necessary for the operation of your business

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Click here for A Freelancer's Guide to Taxes