In which Surah is there no Bismillah?

The correct viewpoint is that there is no Bismillah

between Surah At-Tawbah and Al-Anfal. This is because the Bismillah is considered a verse from the Book of Allah, Glorified and Exalted. Since the Messenger (blessings and peace of Allah be upon him) did not instruct to include the Bismillah between these two Surahs, it was left out.