Sajda-e-Sahw

Q: Is sajda-e-sahw for farz, Wajib and sunnat muakkada salah only or do you have to do it if you make a mistake in nafil salah as well?

Q: One common mistake I make in salaah is sitting in the 3rd rakaat when reading a 4 rakaats salaah, please guide me whether I need to make sajda e sahw?

Q: I forgot to perform sajdah sahw which was wajib upon me during the first 4 rakats of sunnah namaz. Then I started Fardh namaz and once I finished fardh namaz I realised that I forgot to perform sajdah sahw for sunnat namaz. Is it permissible to perform the missed sajdah sahw of the sunnat namaz after the fardh prayer?

Q: If during the 4 rakaah prayers of zuhr or asr during the qaaidah after 2nd rakaat I recite Durood sharif (complete or some part of it) by mistake with Tashahhud.Then should I do sajdah sahw?

Q: Dear Mufti Saheb, In Tuhaftul Almai, pg.219 vol.2, is mnentioned that when making sajdah sahw according to Imam Abu Haneefah, the correct method is to recite all the duas first, then make salaam to the right, then 2 sajdas and then recite tashahhud only, then salaam. Is this the correct procedure. If not, then what is the correct one? Would be grateful if you mention some hawalas.

Q: I was praying the 2 rakaats of sunnah for the Esha salaah. After tashahud in the 2nd rakaat, I stood up and recited Bismillah and Surah Fatiha, whilst reciting I realised my mistake. What should you do in such a situation? It has happened to me before.

Q: I was praying the four fardh of Zuhr Salaah and after two rakaats I read tashahud, durood and dua and made both salaams but whilst making the second salaam I realised my mistake so I stood back up and completed the Salaah but I made sajda sahw. Was this correct? Do I need to repeat my salaah?

Q: If a person because of some disturbance missed an Aayah in Surah ​Faatihah, or one sentence in his At-Tahiyyat, does he have to make Sajdah-e-Sahw? To what extent is the Surah Faatihah and At-Tahiyyat Waajib?

Q: My question is if someone unintentionally read a surah in the third or fourth rakaat of a farz salaah, does he have to do sajda sahw? Similarly, if someone forgot to read a surah in the third or fourth rakaat of sunnat salaah, does he have to do sajda sahw?

Q: I was performing three fardh of maghrib and by mistake, in the last rakaat, I read surah ikhlas and Dua e qunoot - just like 3 witr wajib of Isha. Then I realized my mistake and offered sajdah sahw. Is my Salah valid? What is the method of correcting my mistake such a situation?