Can I back-date the date an item is marked complete?
If I miss checking off a completed task on the date it was finished, is there a way to back-date the completed-on date? I like to use the completed items summary page to track my productivity.
Unfortunately, that's not possible. Once a task is completed, the completion history will use the exact date it's been completed on and the only option is to delete this event.
We may consider adding such feature in the future, though and you're welcome to add a request to our Votebox: http://todoist.com/Vote/
Too bad - I'll have to be more diligent about checking tasks off on time!
I have added a request on Votebox: https://todoist.com/Vote/showProposal/634/