Whereas some Kaddishim end with "Da'amiran Be'alma Ve'imru Amen," others consist of additional prayers and conclude with "Oseh Shalom Bi'mromav…" Is the one reciting Kaddish required to take three steps back for "Oseh Shalom" at the end of Kaddish, as we do for "Oseh Shalom" at the end of the Amida?
The Ben Ish Hai (Rav Yosef Haim of Baghdad, 1833-1909), in his Od Yosef Hai, distinguished in this regard between the "Kaddish Titkabal" that the Hazzan recites following the repetition of the Amida, and other Kaddishim. For the Hazzan reciting "Kaddish Titkabal," the Ben Ish Hai writes, taking three steps back is required, because he needs to step back after repeating the Amida. When reciting the other Kaddishim, however, this is not necessary. The Ben Ish Hai cites this ruling in the name of earlier Poskim (Shalmeh Sibur, Mateh Yehuda). This is the view also of the Kaf Ha'haim (Rav Yaakob Haim Sofer, Baghdad-Jerusalem, 1870-1939), who observed that this was the common practice, adding that this is consistent with the teachings of Kabbalah.
Hacham Ovadia Yosef, however, disagreed, and ruled that it is proper to step back for "Oseh Shalom" at the end of every Kaddish. He refuted the Kaf Ha'haim's claim that Kabbalistic teaching does not require stepping back, noting that Rav Eliyahu Hamwe of Aleppo (1839-1915), a great Kabbalist, writes in his Peh Eliyahu that one must step back at the end of every Kaddish. Moreover, the Radbaz (Rav David Ben Zimra, Egypt, 1479-1573) maintained that one should take three steps back at the end of every Kaddish, and this is also the position of Maran, in Bet Yosef and Shulhan Aruch. Therefore, whenever one recites a Kaddish that ends with "Oseh Shalom," he should take three steps back.
The proper procedure is to move the left foot back, then move the right foot behind the left foot, and then move the left foot next to the right foot. One then recites the words "Oseh Shalom Bi'mromav" while bowing to the left, "Hu Ya'aseh Shalom Alenu" while bowing to the right, and "Ve'al Kol Yisrael" while bowing frontward. He then stands upright for "Ve'imru Amen."