Please follow the steps below to change your online user ID on Citizens Bank.
Open Citizens Bank website on your desktop computer or laptop.
Click Log In.
Then, a drop down list will appear. Click on Log In.
Now, log in with your online user ID and password.
Once you are logged in, you will see several tabs at the upper part of the screen. Click on the tab that says Service Center.
Under Manage Preferences, you will see an option for Online User ID and Password. Click on Online User ID and Password.
On the page, you will see a section from which you could change your online user ID. On the field provided, enter the new online user ID you wish to use.