One goat as a sin-offering, besides the sin-offering of atonement and the continual burnt offering and its grain offering and their libations.
Torah Temimah: Yoma 70b
English: It was taught: R. Akiva says, the [inner] service of the day precedes the goat done outside, as it is said “one goat besides the sin-offering of atonement.”
Order of Yom Kippur offerings.
The special day-service comes before the outer musaf goat.