The ability to indicate how much of an expense item is deducible and eligible for P&L. The default should be 100.

This would allow the user to track the entire expense AND indicate how much is deductible. Otherwise I need to manually split and enter the expense amount to reflect how much should be included in my P&L

Use Case: The amount of my tablet is say 500 dollars. Since I use the table for personal use as well only 50% is allocated to the business as a deduction. Today I have to put in 250 to make sure this shows up on my P&L correctly. It would be nice to put in the full $500 and then 50% Deductible, so that 250 would automatically show up on PL.