I also want to see the ability to tag split transactions, especially on Checks and Expense transactions.   I have a client that uses tags to track money coming in and out on specific events/activities. Some of the expenses are part of a credit card payment, which covers multiple cc transactions (so multiple accounts are used). If a tag can't be assigned to a specific line item in the expense page, what workaround can be used to tag it? 

The client is on QBO Essentials, so classes is not an option  (though it was an option on the lower version of QBD that the client recently migrated from). For business reasons, the client pays vendors by checks and currently a Bank Feed for the credit card is not an option. 

FYI, I did submit feedback via the Feedback link in the product. 

Any workaround suggestions are greatly appreciated.