There used to be ways to close tasks in the mobile app but they have vanished.
We used to be able to swipe left or right from the task list to reveal a green checkmark. That's gone now.
There used to be a checkmark after opening a task. That's also gone.
Now it takes about 5 taps to close one. I use Click Up for my grocery list so this is pretty time consuming to do this for each task as I'm walking through the store.
Please bring back a one or two tap or slide method for closing tasks or makes it a feature we can enable.