1959
https://wol.jw.org/en/wol/d/r1/lp-e/1959321?q=immortal+soul+satan&p=par
It was the “wicked one,” Satan, who told mankind’s ancestors: “You positively will not die.”
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This was the first lie, from the father of lies, including his later lie about the inherent immortality of the soul. (Gen. 3:4; John 8:44)
1990
https://wol.jw.org/en/wol/d/r1/lp-e/1990327?q=immortal+soul+satan&p=par
Who was it that led humans to believe that lie? Jesus identified him when he said to the religious leaders of his day: “You are from your father the Devil, and you wish to do the desires of your father. . . . When he speaks the lie, he speaks according to his own disposition, because he is a liar and the father of the lie.” (John 8:44) Yes, it is Satan who developed the immortal-soul idea to turn people away from true worship. So one’s course of life and hope for the future are put on the wrong path by believing doctrines that grew out of the first lie recorded in the Bible, though at that time Eve no doubt understood the serpent to mean merely that she would not die at all in the flesh.
2019 (not QFR)
https://wol.jw.org/en/wol/d/r1/lp-e/2019363?q=immortal+soul+satan&p=par
Another satanic lie is that humans have an immortal soul. If that were true, everyone would live forever.