I have this problem and I still cannot get the option to change to splitting by amount rather than percentage. I'm not trying to set up a rule or anything like that. I have a deposit. I want to split that by dollar amounts because it is 3 separate checks in one deposit. When I click split, it only allows me to split by percentage. There is no drop down menu to select "amount" instead of "percentage." I am also using QuickBooks Self-Employed on the website.