Hope someone can help. I've managed to get myself lost adding a number of days or COMPLETED formula. Essentially, I need to count the number of days since a task was completed so in J2 I've added =DATEDIF(I2,TODAY(),"d"). When the task is complete I need to add another date into K2 and for this to alter the record in J2 to the text COMPLETED. I've used Excel for years but am only now trying to write formula myself. Many thanks