(closed account) says:
On the website, select the task, press DELETE.
On iOS new app, select the task. In the top right hand corner, press the icon that is 3 dots in a column, select DELETE. This is the same process used for uncompleted tasks, too.
Don't know about the other platforms.
On iOS new app, select the task. In the top right hand corner, press the icon that is 3 dots in a column, select DELETE. This is the same process used for uncompleted tasks, too.
Don't know about the other platforms.