Support intakes ("negative expenses")
In virtually every event I have had intakes, for example getting back deposit of (many ;-) bottles once they are returned, or cash contributions from our party guests. It is virtually impossible to cover this case with the current implementation (sometimes I helped myself by adding a virtual person named "deposit" and split my beer purchase into an expense and a deposit transfer to that person), however, that is impossible in some other cases.
What should make this feature exceptionally easy to implement is that you just (hopefully) need to accept negative expenses in the input mask and then do all other calculations further downstream as before.
There are 20 more votes for this on the equal and more recent "Income" proposal