Got a new TN but staying with my current employer

Hi,
I recently got my new TN for a job that I was about to join in 15 days, but I have decided to stay with my current employer (Previous TN), I have both TN Visas on my passport but in DOHS's system I am going to join the new employer in two weeks time which is offcourse not going to happen now since I am staying with my current employer, please advise what steps do I need to take in order to notify the authorities of this change of heart

Best Regards
Max

Nothing really. next time you leave US hand in the new TN. YOur old TN is still valid for the duration.