A complaint under the Sarbanes Oxley Act of 2002 must be filed with the Department of Labor, in writing, within 90 days of when the employee learns that he or she will, or has been, subjected to discrimination, harassment or retaliation. Based on what you've said, it sounds like that time frame has already passed. If you have other questions or need clarification, it is always good to contact an employment attorney to be sure.
If you were terminated from your job you might still have a case under the Ohio common law claim of wrongful discharge in violation of public policy. The public policy would be found in SOX or another federal or state statute. Take a look at neellaw.com/wrongful-termination for more information about wrongful terminations.
My responses/answers are not legal advice and should not be considered or relied upon as such. The purpose of my responses/answers are solely to provide help and guidance. No attorney-client relationship is intended to be established nor is one established by virtue of my responses/nswers.