Never, NEVER, click on a link and update information, even if it turns out to be legit in the end.
Just contact them directly via support, or log on to your account as you normally would (NOT through a link) and make changes if you need to. This applies pretty much to everything.
@Nate_Pearson
If TR have sent a message with a link to update your details here, I am very disappointed in them, they should know better. It should just say log on to your account and update your payment details please.