Background: I have a sheet with a list of projects and their monthly savings actuals+forecast (Jan thru Dec) and prior forecast (Jan thru Dec) where prior forecast is last month's actuals plus forecast. Between the 1st and 10th of every month, project owners will go in and update actuals for the previous month and forecast out to the end of the year.
Goal: Before the PM's update their projects on the 1st, copy the data to another file and use index(collect()) on the main file to fill in the values for prior forecast.
The problem I have is when I copy the data to another file using automation, it won't write over the data already there from last month's copy. Is there another way to do this?