I have my TN visa with US employer and work as a Project based employee. My visa is valid until 2023 with this employer but my first project has come to an end and I have got my next assignment in a different state. Do I need to inform and provide this update to CBP of this change? If anyone has had similar situation then please provide some insight. Do I need to get a revised petition letter (from my current employer that I already have my current TN visa with) with the name and address of the new client and start date of the project? Do I need to call and schedule an appointment by calling the CBP for land border crossing?