Hello, I heard your want to change your binding steamID, I hope my reply can help you.
First of all, TruckersMP does not support the replacement of binding!
But if you accidentally registered an account and want to use this account to bind another steam,I can give you a method to change.
>>>First, go to this address to cancel your current account, follow the prompts to complete all steps
>>>https://truckersmp.com/profile/delete<<<
>>>And then wait for 14 days, (Please note: you must wait for 14 days to cancel the account), then you can re-register your account !
Kind Regards,
Roboter