my ex still married took my kids to another state how do i get my kids back

There are multiple factual questions before any reasoned answer could be given.  For example -- why were you waiting for 7 months?  If there were promises or expectation of return, the time might not "count" against the 6-month clock that normally runs to determine a new Home State for the children -- and that could determine whether you can file here or must file wherever they went.  For background, see http://willicklawgroup.com/child-custody-and-visitation/ Also see the article "The Basics of Family Law Jurisdiction" that is posted there.  for more specific advice and consideration of all the facts of your actual situation, you really need to consult a family law specialist well versed in jurisdiction.  But do so soon -- time is not your friend in this analysis, and any further delay could be damaging to your case.