Thanks for getting back into this thread, @chanscar.
Yes, you're correct that the tag feature can only be added per transaction and is not possible with split transactions. You're unable to tag a specific line item on your sales receipts. You may visit these articles for more details about this option:
If you need to group income and expenses for things like job costing, budgeting, or fund accounting, I suggest using the classes feature. It's also best to use classes to track specific line items in your transactions.
Additionally, you can visit this resource to check the available reports for your versions that can help you manage your expenses or other transactions: Reports included in your QuickBooks Online subscription.
Feel free to get back to me here in the Community space if you need further assistance with managing sales transactions. I'll also address other QuickBooks-related concerns you might have. Have a great day ahead.
