To change your first or last name in RB2B, navigate to the bottom left of your window, click on the Account Details button to access a dropdown menu, and select Account Settings. In the Users tab, you'll find a list of all of the users on the account. Find your user in the list. At the top right of the card, click on the three vertical dots to open a menu where you can choose to Edit user details.

Update your first and last name as needed. Click Save changes to publish your changes or click Cancel to abandon your changes.