I am trying to archive done/ completed tasks after a month. This will allow us to still see or find past tasks but also remove them from the overall tasks view.
Welcome to the community, @Kyra_Harmston! This is a situation where you would use a filter on a view. Click on the “Filters” button near the top of the table, and add a filter that will only show records where the task is marked as complete (however you indicate that) and the date field is after one month ago. Here’s an example of how that might look: