The answer depend son whether you are truly salaried. i would need to know your position with the employer and the duties required for your position. There are many cases where an employer hires a person as a salaried employee but under the Fair labor Standards Act, the person is not qualified as a salaried employee and can recover time and a half for their overtime worked. The look back period can be 2-3 years. Talk to an employment lawyer (wage & hour).