Here is what we read about the Day of Atonement (Yom Kippur).
... it is a day of atonement, to make an atonement for you before the LORD your God. (Lev 23:28)
And the priest, whom he shall anoint, and whom he shall consecrate to minister in the priest's office in his father's stead, shall make the atonement, and shall put on the linen clothes, even the holy garments:
And he shall make an atonement for the holy sanctuary, and he shall make an atonement for the tabernacle of the congregation, and for the altar, and he shall make an atonement for the priests, and for all the people of the congregation.(Lev 16:32.33)
The Day of Atonement was a type of the day of crucifixion. The big difference was that Christ was the ultimate Lamb of God who TOOK AWAY the sin of the world at the cross. While the temple and its sacrifices stood, the sins of Israel were only COVERED. But when Christ died for our sins, He cancelled the sin debt, "and there remaineth no more sacrifice for sins".
The theory of "the investigative judgment" has no basis in the book of Hebrews or anywhere else in Scripture. And of course neither is 1844 found in the Bible! 2300 days ( 6 years and approx 5 months) was reinterpreted as 2300 years, but it pertains to Daniel's 70th week and the Abomination of Desolation.