computational physics - Finding Transition states from Saddle points

I have a set of saddle points of molecule with corresponding energy values. I would like to find the transition state of the molecule. I understand that transition state is the first-order saddle point. But I have a problem on realizing the definition to the real problem.

My question is: How do I select the particular saddle point to be a transition state? Is the structure corresponding highest energy a transition state?

I appreciate your answer.

Thank you.

ps: molecule has rotational transition state