In many cases, if you work for an employer on at-will employment terms, you can be fired without your employer giving you a reason. You can also terminate your employment without having to provide a reason for quitting.
However, there are some situations in which you may be fired illegally. State and federal laws prohibit employers from firing an employee because of discrimination, whistleblowing or because they have applied for workers’ compensation or family or medical leave. If this has happened to you, you may have grounds to sue your employer.