If the Board Meeting is scheduled for April 1st in the main item, what formula could I use to populate the Due Date for subitems based on the Days Before column? I am currently manually entering the Board Meeting date in the subitem column, but would like to skip this step for ease of updating.
For this, I would suggest the following formula: SUBTRACT_DAYS({Date},20)
In the {Date} part, you will put {Board Meeting} instead to return the date 20 days prior to the board meeting date.
Then, you can change the formula to SUBTRACT_DAYS({Board Meeting},14) or SUBTRACT_DAYS({Board Meeting},7) to show the proper dates for accomplishing the Past Minutes and Action Items tasks.