I have to agree with Jonny that this explanation isn't very helpful. I've attached a screen shot of the tax profile section where it asks for 'Other Income (i.e. rental income)'. For this accounting programme to tell me how much I owe HMRC, surely you'll be able to tell me whether this is the total amount of money I make in profit (less mortgage, service charges and other costs), or the total income I make (inclusive of these charges?).