Can someone help me updating my bank information online

Thanks for becoming part of the Community, elissarnaser-yah.

You can update a connected account's banking details from your Banking screen.

Here's how:

1. In the left navigation bar, go to Banking.
2. Find and click an account you want to edit. When an account's selected, it will display with a blue background color instead of grey.
3. Use its Pencil (📝) icon.
4. Select Edit sign in info.
   
5. Make any necessary changes, then save them.

I've also included a detailed resource about working with online banking which may come in handy moving forward: Connect bank & credit card accounts

Please don't hesitate to send a reply if there's any additional questions. Have an awesome day!