1Password 8 will not forget my account

ZA1166

I'm sorry that the steps provided above aren't working. Try these manual steps:

1. On the Mac, launch the "Keychain Access" utility that comes with macOS. If you see a prompt asking you to manage your passwords in System Settings, click “Open Keychain Access”.
2. In the search box in the upper-right corner of the app, search for "com.agilebits.onepassword.b5" (without the quote marks)
3. Each search result you see is one account's details that are stored in iCloud Keychain
4. Double-click on the entry you want to examine
5. Tick the "Show password" box at the bottom of the Attributes tab, and enter your macOS user password when prompted
6. The contents of the box will show the stored account details - you can click into the box and use the up and down keys on your keyboard to see all of the details
7. When you have identified the entry that relates to the specific membership you no longer want to have recorded in iCloud Keychain, delete that one com.agilebits.onepassword.b5Credentials entry

Let me know how that goes.

This is on a company device and I'd like to remove my personal credentials so that if I return it, it will not persist.

Does your company allow you to wipe the Mac before you return it? That would be the best way to ensure that none of your personal information is left on the device. Apple has a guide here: What to do before you sell, give away, trade in, or recycle your Mac - Apple Support (CA)

-Dave