+1 for being able to add tags to a split transaction

Categories are often used for different types of expenses.

And then tags used on top to keep track of a particular project.

It's a common scenario that a large expense to a single supplier will be for more than 1 project.

Without being able to split up the transaction and tag each split item individually, there is no way to use these tags to keep track of project expenses.

I had no idea this functionality didn't exist when upgrading my account (the only reason I upgraded was for tagging).

Could this functionality please be implemented as quickly as possible? 

I would consider this "essential" to tagging functionality.

Thank you for your help.