Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 1 year ago

You should take it as forth Rak'at and complete the Salaah accordingly but you must pray immediately after Salaam, one Rak'at of Salatul Ehtiyat in which you recite Sura Al-Hamd only then do Rokoo' and Two Sajda then Tashahhud and Salaam.