I set up rules but they are not filling out the Vendor.

Yes, bank rules save you time in categorizing transactions @pkuroda. 

Let's review your bank rules setup and perform some troubleshooting steps so you can ensure they're applying to your transactions in QuickBooks Online (QBO) accordingly.

By default, QuickBooks shows the description in your list of transactions to make it easier to understand. However, regardless if your banking setup displays either the description or bank details, the vendor name should still appear under the Payee column.

To fix this, you'll need to check your bank rule setup to make sure all its information is correct. Here's how:

1. Go to Bookkeeping or Banking, then select Rules.
2. Locate the rule you want to review.
3. Click Edit under the Actions column.
4. Carefully check the details and select Save once done.

In case the details of your bank rule are all correct, you can perform some troubleshooting steps. This banking error may be due to corrupted or damaged webpage data.

You can start by pulling up your QuickBooks Online (QBO) account using a private browser (incognito). Here's how:

• Press Ctrl + Shift + N (Google Chrome)
• Ctrl + Shift + P (Firefox)
• Control + Option + P (Safari)

Once signed in, go to the Banking menu and check that the rules are filling out the vendor name. You can check out this article to guide you in reviewing transactions recognized by a bank rule: Set up bank rules to categorize online banking transactions in QuickBooks Online.

If the bank rules filling out all the info you need, return to your default browser and clear its cache. This will refresh the system and remove older data that causes viewing and performance issues. However, if this matter continues, I'd recommend using other supported browsers.

Also, I encourage you to reconcile your accounts regularly (every month). This helps you monitor your income and expense transactions and detect possible errors accordingly. You may want to check out this article as your reference in doing or fixing a reconciliation in QBO: Learn the reconcile workflow in QuickBooks.

Let me know if you have other banking concerns or questions about managing transactions in QBO. I'll gladly help. Take care, and have a great day, @pkuroda.