I figured this out by intuition, since I couldn’t find a tutorial online. It is very easy to import a list of tasks into Google tasks. I had a list of movie names, one name per line, that were on my “to watch” list in a text file. I selected all the names and copied them to the windows clipboard, and then pasted into a single task in Gmail window. Google tasks then automatically realized that each line that I was pasting into the single task was actually a separate task, and created a new task per text line I was pasting. Awesome!