Can't change Train routes

[DevM]

Hi, I cannot submit an expense claim because of the following error "Missing required field: Train routes."

I need to change the train routes on the provided drop down list, as it doesn't have the route I need. How do I do this?

Thanks.

[KevinD]

@DevM looks like you got this figured out. 

[DevM]

Not really. In the interest of time, I selected the nearest route and put in a note in to my approver to explain the discrepancy.

It would still be helpful to know how to change/update a new route.