Student often get worried because they didn’t hit the “submit” or “continue” button at the end of one of the TOEFL writing tasks before time ran out. They worry that their answer wasn’t saved, and that it won’t be graded.
Don’t worry: whatever was on your screen when time ran out was submitted automatically. It will be graded. It is not necessary to hit the “submit” or “continue” button.
This has come up a million times, and has never been a problem. You can stop worrying now!