Contractor or employee?
How the difference changes the forms you get and the tax you handle yourself.
In plain words
An employee gets a W-2, and the employer withholds income tax and pays part of Social Security and Medicare.
A contractor usually gets a 1099-NEC, has no tax withheld, and handles their own income tax and self-employment tax.
The label in a contract is not what decides it. How the work is controlled and paid matters. The IRS publishes guidance on this; when in doubt, ask a tax professional.