When should I do sajdah while I m reading Quran?

You should perform sajdah (prostration) while reading the Quran when you encounter specific verses that indicate the need for it, known as ayat al-sajdah. There are 14 such verses in the Quran, and upon reciting or hearing these verses, it is recommended to perform the sajdah as an act of humility and reverence. It's typically done immediately after reciting the verse, but you can also do it later if needed.