How can I create 1 task that can be updated in 2/3 lists / spaces ?

Hey, Catherine! It sounds like you'd take advantage of our tasks in Multiple Lists feature. Check it out below: https://docs.clickup.com/en/articles/4193261-tasks-in-multiple-lists-clickapp I highly recommend reading that help doc as it explains some of the information that is good to know when adding tasks to multiple Lists in ClickUp! A task basically has a home List and you add that same task to other Lists. Because it's the same task, regardless of which List it's in, any edits made or comment left will be displayed no matter which List you're viewing from.