are you sure they are treating you as an employee where you'll get or got a W-2? if you get a 1099-NEC they're treating you as an independent contractor making you responsible for paying any federal or state taxes.
If you are concerned that your employer is improperly withholding or failing to withhold federal income and employment taxes you should report your employer by contacting the IRS at 1-800-829-1040. Keep in mind, however, that whenever you start a new job, you're supposed to fill out Form W-4 which is used to figure withholding.
