Siman 621
Presented here for study, not as a practical ruling. The Shulchan Aruch rules by Sephardi custom, the Rema's glosses by Ashkenazi custom, and the Kitzur follows Ashkenazi custom. For a practical question, ask your rabbi.
א מוֹצִיאִין שְׁנֵי סְפָרִים, בְּרִאשׁוֹן קוֹרִים שִׁשָּׁה בְּפָרָשַׁת אַחֲרֵי מוֹת עַד וַיַּעַשׂ כַּאֲשֶׁר צִוָּה ה'; וְאִם חָל בְּשַׁבָּת, קוֹרִים שִׁבְעָה וּמַפְטִיר קוֹרֵא בַּשֵּׁנִי בְּפִנְחָס וּבְעָשׂוֹר לַחֹדֶשׁ, וּמַפְטִיר בִּישַׁעְיָה: וְאָמַר סֹלּוּ סֹלּוּ פַּנּוּ דָרֶךְ, עַד כִּי פִי ה' דִּבֵּר.
1 “The order of the reading of the Torah and of circumcision on Yom Kippur” - Containing six paragraphs. We take out (from the ark) two Torah scrolls. In the first Torah six men read from the portion “אחרי מות”, (Leviticus 16:1-18:30) until “and he did as the Lord commanded (Moses)”, (Leviticus 16:34). But if (Yom Kippur) falls on Shabbat, seven (men read from the first Torah), and the Maftir (the last reader) reads from the second (Torah scroll) from the portion, Pinḥas, (Numbers 25:10-30:1), the section “and you shall have on the tenth day of this seventh month”, (Numbers 29:7-11). The Maftir (the Haftarah section from the Prophets) comes from Isaiah, “and shall say, cast you up, cast you up, prepare the way” until “for the mouth of the Lord has spoken it”, (Isaiah 57:14-58:14).
ב מִילָה בְּיוֹם הַכִּפּוּרִים, מָלִין בֵּין יוֹצֵר לְמוּסָף, אַחַר קְרִיאַת הַתּוֹרָה; וּלְאַחַר הַמִּילָה אוֹמְרִים: אַשְׁרֵי וְהַמִּנְהָג לָמוּל אַחַר אַשְׁרֵי (מִנְהָגִים); וְאִם הוּא בְּמָקוֹם שֶׁצָּרִיךְ לָצֵאת מִבֵּית הַכְּנֶסֶת, אֵין מָלִין עַד אַחַר חֲזָרַת סֵפֶר תּוֹרָה, וְחוֹזְרִים וְאוֹמְרִים קַדִּישׁ.
2 If there is a circumcision on Yom Kippur; then they circumcize between the (Morning Prayer prior to the Keri’at Shema named) “יוצר”, “Creator,” and the Additional Service after the reading of the Torah. And after the circumcision we say the prayer, “אשרי” But the custom is to circumcize after the “אשרי”, (מנהגים). And if the circumcision takes place in a location where it is necessary to leave the synagogue, we do not circumcize him until after the Torah scroll is returned to the ark, and then they return (to the synagogue) and say the (reader’s) Kaddish.
ג מְבָרְכִין עַל הַמִּילָה בְּלֹא כּוֹס וְיֵשׁ אוֹמְרִים דִּמְבָרְכִין בַּכּוֹס וְנוֹתְנִים לַתִּינוֹק הַנִּמּוֹל, וְכֵן נוֹהֲגִין.
3 We bless the circumcision without a cup (of wine). (There are those who say that we bless (the circumcision) with a cup (of wine) and we give it to the infant who is 179 circumcized, and this is the custom.)
ד בְּמוּסָף אוֹמֵר שְׁלִיחַ צִבּוּר סֵדֶר עֲבוֹדָה. הַגָּה: וְנוֹהֲגִין לִפֹּל עַל פְּנֵיהֶם כְּשֶׁאוֹמְרִים וְהַכֹּהֲנִים וְהָעָם, וְגַּם בְּעָלֵינוּ לְשַׁבֵּחַ; אֲבָל שְׁלִיחַ צִבּוּר אָסוּר לַעֲקֹר מִמְּקוֹמוֹ בִּשְׁעַת הַתְּפִלָּה כְּדֵי לִפֹּל עַל פָּנָיו, וְיֵשׁ לִמְחוֹת בְּיַד הָעוֹשִׂים כֵּן.
4 In the Additional Service the reader recites the order of the Avodah. Rema: It is customary to fall on their faces, prostrate, as they say the section of the Avodah, “and the priests and the people…” and also to prostrate when saying the Aleinu Prayer. But the reader is forbidden to move from his place at the time of the prayer in order to prosstrate, and one should object to those who do this (prostrate).
ה סֵדֶר הַוִּדּוּי: חָטָאתִי, עָוִיתִי, פָּשַׁעְתִּי.
5 The order of the confession is; I have sinned, I have transgressed, I have offended, etc.
ו נָהֲגוּ לִדֹּר צְדָקוֹת בְּיוֹם הַכִּפּוּרִים בְּעַד הַמֵּתִים. וּמַזְכִּירִין נִשְׁמוֹתֵיהֶם, דְּהַמֵּתִים גַּם כֵּן יֵשׁ לָהֶם כַּפָּרָה בְּיוֹם הַכִּפּוּרִים (מָרְדְּכַי).
6 It is customary to pledge (to vow) charity on Yom Kippur for the dead, (and they remember their souls because the dead also have atonement on Yom Kippur), (מרדכי).