Greetings, @priya2.

Let me be the first to welcome you to the Community space. I’m here to share how to update the vendor’s account or routing number in the system.

You can manually change the vendor’s banking info for your Online Bill Pay by logging into your QuickBooks Online account. Here’s how:

1. Go to the Pay Bills Online page.
2. Select Enter vendor’s bank account info.
3. Click Next.
4. Enter the vendor’s bank account information.
5. Hit the Save button.

You may refer to these articles for additional information about Online Bill Pay:

• Online Bill Pay - Pay a Vendor
• Online Bill Pay - Manage Vendor Payment Method
• Online Bill Pay – Setting up bank transfer (ePayment) for vendor

That should get you pointed in the right direction. 

Should you need anything else or if you have any questions, feel free to leave a comment below. I’m always here to help. Have a good one!