I am trying to create a formula that will solve YES/NO if a row is past-due. I am defining past due as the actual completed date being past the estimated completion date. However, the actual completed date is not entered until completion where the row may already be past due. Hence, I want to use the current date less the estimated completion date until the actual completion date is entered. The Today() date is in cell E2 Est. Completion date is in cell E4 actual completed date is in cell F4. I need a formula that will calculate past due based on E2-E4 until a date is placed in F4 then I would like the past-due to be calculated as E2-E4.