what is the statute of limitation for wrongful termination

There is no one single statute of limitations for wrongful termination because there are several different laws that may apply.  The deadlines for filing range from 30 days to 3-4 years in certain circumstances.  The majority of claims under federal law are subject to a 180 day filing deadline.  You really need to consult with an attorney to determine whether you have a claim for wrongful termination and what the appropriate statute of limitations applies.