Inside a case, from the blue left side panel, select Income and Expenses.
For anticipated changes to income, select the Income tab and scroll to the very bottom of your screen. Select the Anticipated Changes button in the far right corner, select Yes, add your text to the dialogue box, then click Save and Close.
For anticipated changes to expenses, select the Expenses tab and then select the Additional tab. Select Yes to the Changes Anticipated question, add your text in the dialogue box, then click Save.