You can delete the tag by going to the All List column, tmb48.
Here's how:
- Go to the Gear icon and select All lists.

- Select Tags and locate the tags you want to delete. Please note that once you delete a tag, it will automatically delete the assigned transactions in QBO.

- Tap the dropdown arrow under the Action column and click Delete tag.

- Click Delete to confirm.

I'll be sharing these links that will guide you in enhancing your custom fields and personalizing your sales forms in QuickBooks:
Keep me posted if you still have questions about tags or concerns related to QuickBooks. I'll be around for you.