Tags have become a critical way for us to do proper budgeting for our non-profits transactions and to give our operational divisions a way to know what they've spent without cluttering up our chart of accounts for when we pass our finances off to our accountant for taxes. The fact that we can't

1) add tags to journal entries and
2) add tags to individual line items in split transactions/journal entries

is a huge problem for us and means that we either have to go back to having a chart of accounts that is a mess, or we have to spend a lot of time recreating the data that already exists in QBO in a spreadsheet. Both of these features would save our accounting team a lot of time, and given that all of our staff are volunteers with full time jobs outside of the organization, time is at a premium.