Siman 659
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 מוֹצִיאִים שְׁנֵי סְפָרִים; בְּאֶחָד קוֹרִים: שׁוֹר אוֹ כֶּשֶׂב, בְּפָרָשַׁת אֱמֹר, וּבַשֵּׁנִי קוֹרֵא הַמַּפְטִיר קָרְבְּנוֹת הַמּוּסָפִין וּבַחֲמִשָּׁה עָשָׂר יוֹם לַחֹדֶשׁ הַשְּׁבִיעִי, וּמַפְטִיר בִּזְכַרְיָה: הִנֵּה יוֹם בָּא וְכו'.
1 The order of Torah reading on Sukkot: We take out two Torah scrolls. From the first we read "When an ox or lamb..." from Emor [Leviticus 22:27], and from the second we read the maftir from the section on mussaf sacrifices "On the fifth day of the seventh month" [Numbers 29:12]. The haftarah is from Zachariah "Behold a day is coming..." [14:1].