If you received a Form 1099-MISC instead of a Form W-2, the income you received is considered nonemployee compensation or self-employment income.
Self-employed status means that the company or individual you worked for didn’t withhold income tax or Social Security and Medicare tax. As a result, you’ll need to complete Schedule C (or Schedule F) and Schedule SE.
To enter or review the information from Form 1099-MISC, Box 7 Nonemployee Compensation:
You don’t have to be a business owner to be treated as a self-employed worker. Simply performing services as a nonemployee can be enough to create this tax treatment
See Employee or Independent Contractor for more information.