I am trying to open a new bill for an existing vendor. I have paid the past bill with said vendor. However, when I enter a new bill it opens the past bills.

Hello, rsresource. You've come to the right place to help you understand why your paid bills are showing when creating a new bill for the existing vendor.
 

When you create a new bill for an existing vendor, the system will not display the paid bills by default. This is because the system assumes that you are creating a new bill for a new payment rather than a payment already made. Please see my screenshots below.

We can also double-check your vendor account history to ensure these bills have been paid. You can access the vendor's payment records by navigating to your vendor's account's "Bills" section. From there, you can filter the payments by vendor and view a list of all the payments made to that vendor, including the bills that have already been paid.  

However, if you have verified that these bills are already paid, open your account using an incognito or private browser. This will ensure that your browsing history and cache are not saved, which can sometimes cause issues accessing certain websites. To open an incognito or private browser window: 

• Ctrl + Shift + N for Google Chrome
• Ctrl + Shift + P for Firefox
• Control + Option +P if you're using Safari
• Ctrl + Shift + P for Microsoft Edge

Once you have opened the incognito or private browser, log in to your QuickBooks account and create a new bill for the existing vendor. This will help you determine if the issue is specific to the paid bills or a more general problem with the browser. 

If you're still experiencing issues with paid bills, temporary internet files stored in your browser could be the culprit. To fix this, try clearing your browser cache and cookies. This will remove any temporary files that may be causing the problem. If clearing your cache and cookies doesn't work, I suggest using a different browser. Sometimes, specific browsers may not be compatible with certain features. Additionally, make sure your browser is up-to-date with the latest version. Outdated browsers can cause problems with the feature's functionality.
 

Additionally, we'll share these articles to help manage your bill transactions:

• Enter and manage bills and bill payments in QuickBooks Online.
• Show all items on the Bill Payment voucher in QuickBooks Online.
• Run report with vendor totals.

Contact me if you have further questions regarding your vendor's bill; I want to ensure you're taken care of. Thanks for coming to the Community, and have a fantastic day ahead!