Thanks for checking out the Community space, ACJB.

I understand that you need to add a tag to your split transactions.

While this feature is still unavailable in QuickBooks Online, you'll want to directly send feedback to our Product Development Team. At times, we roll out product enhancements based on the requests that we received from our customers. Here's how to submit feedback:

1. Sign in to your QBO account.
2. Click the Gear icon at the top, then choose Feedback.
3. Enter the new features you would like us to add in the description box.
4. Select Next to send feedback.

I've also some articles that you can browse to learn more about how tags work in QuickBooks Online:

• Tag transactions
• What are tags and why should I use them?

Feel free to leave a comment below if you any other concerns or additional questions. Have a great rest of the day.