Hi Sasha89,
Welcome to Community! Having your bank account connected to QuickBooks Online is a great way to ensure your books are up to date. I'll be happy to provide more information so you can get back to what you love!
It's great to hear that you can access your online banking on your bank's website. However, if there's been a recent change in your login information, you'll also need to update it in QuickBooks Online. Here's how:
1. From the left menu, open Transactions and then select Banking
2. Click on the tile for the bank account and open the Edit ✎
3. Choose Edit sign in info
4. Update the information
5. Hit Save and connect
Here's a helpful guide about what to do if you get a bank error or can't download transactions in QuickBooks Online.
Please don't hesitate to let us know if this solves the issue. Your success is important and we're always pleased to help!